The search never finds anything if you don't expand everything first
https://prnt.sc/fApajxf9qaqB
a) allow to expand all (and not only next 500) -and/or-
b) search in collapsed branches and expand automatically on click to search result

Can you provide me with the list of your mods so that I can reproduce the error on my side please?

this is not a bug, that depends on any mod. this is a "feature" of your mod ;-)
e.g. search for a recipe. only the first 500 seem to be searched until you expand the recipes, then the first 1000 are searched and so on

yes I understood correctly but I would like to reproduce as best as possible and I rarely play with mods that add so much research or recipe.
I would like to have your list to reproduce what is happening as best as possible.

Now specifically I wanted to look something up in Kux-SolidifiedFluids at runtime.
But for the sake of completeness, here is my complete mod list if you think you need it.

{
  "mods": 
  [

    {
      "name": "base",
      "enabled": true
    },

    {
      "name": "elevated-rails",
      "enabled": true
    },

    {
      "name": "quality",
      "enabled": true
    },

    {
      "name": "space-age",
      "enabled": true
    },

    {
      "name": "0-event-trace",
      "enabled": true
    },

    {
      "name": "0-Kux-PreEvents",
      "enabled": true
    },

    {
      "name": "AdditionalPasteSettings",
      "enabled": false
    },

    {
      "name": "advanced-fluid-handling-space-age",
      "enabled": false
    },

    {
      "name": "ammo-loader",
      "enabled": true
    },

    {
      "name": "BarrelFluidIcons",
      "enabled": true
    },

    {
      "name": "black-rubber-belts-continued",
      "enabled": true
    },

    {
      "name": "BottleneckLite",
      "enabled": true
    },

    {
      "name": "chest-auto-sort",
      "enabled": true
    },

    {
      "name": "chests-in-space",
      "enabled": true
    },

    {
      "name": "ChunkyChunks",
      "enabled": true
    },

    {
      "name": "color-coding",
      "enabled": true
    },

    {
      "name": "compaktcircuit",
      "enabled": true
    },

    {
      "name": "companion-drones",
      "enabled": true
    },

    {
      "name": "conrete-retexture-nx",
      "enabled": true
    },

    {
      "name": "crafting-queue-enhancements",
      "enabled": true
    },

    {
      "name": "creative-mod",
      "enabled": true
    },

    {
      "name": "cybersyn",
      "enabled": true
    },

    {
      "name": "cybersyn-combinator",
      "enabled": true
    },

    {
      "name": "debugadapter",
      "enabled": false
    },

    {
      "name": "developer-assistant",
      "enabled": false
    },

    {
      "name": "DoingThingsByHand",
      "enabled": true
    },

    {
      "name": "EditMapSettings",
      "enabled": true
    },

    {
      "name": "EditorExtensions",
      "enabled": true
    },

    {
      "name": "even-distribution",
      "enabled": true
    },

    {
      "name": "even-pickier-dollies",
      "enabled": true
    },

    {
      "name": "EvenDistributionLite",
      "enabled": false
    },

    {
      "name": "factorissimo-2-notnotmelon",
      "enabled": true
    },

    {
      "name": "factoryplanner",
      "enabled": true
    },

    {
      "name": "FactorySearch",
      "enabled": true
    },

    {
      "name": "factory_graph",
      "enabled": true
    },

    {
      "name": "FilterHelper",
      "enabled": false
    },

    {
      "name": "flib",
      "enabled": true
    },

    {
      "name": "FluidMustFlow",
      "enabled": false
    },

    {
      "name": "FNEI",
      "enabled": true
    },

    {
      "name": "ghost-mode",
      "enabled": true
    },

    {
      "name": "gvv",
      "enabled": true
    },

    {
      "name": "inserter-throughput",
      "enabled": false
    },

    {
      "name": "jalm",
      "enabled": true
    },

    {
      "name": "KrastorioAirPurifier",
      "enabled": true
    },

    {
      "name": "kry_stdlib",
      "enabled": true
    },

    {
      "name": "Kux-BlueprintExtensions",
      "enabled": true
    },

    {
      "name": "Kux-CoreLib",
      "enabled": true
    },

    {
      "name": "Kux-CraftingTools",
      "enabled": true
    },

    {
      "name": "Kux-Modifications",
      "enabled": true
    },

    {
      "name": "Kux-OrbitalIonCannon",
      "enabled": true
    },

    {
      "name": "Kux-PersonalTeleport",
      "enabled": true
    },

    {
      "name": "Kux-PowerPoles",
      "enabled": true
    },

    {
      "name": "Kux-ProductionRates",
      "enabled": true
    },

    {
      "name": "Kux-PrototypeExport",
      "enabled": false
    },

    {
      "name": "Kux-Radars",
      "enabled": true
    },

    {
      "name": "Kux-RawDataProvider",
      "enabled": false
    },

    {
      "name": "Kux-SlimInserters",
      "enabled": true
    },

    {
      "name": "Kux-SmartLinkedChests",
      "enabled": true
    },

    {
      "name": "Kux-SolidifiedFluids",
      "enabled": true
    },

    {
      "name": "Kux-SpeedButtons",
      "enabled": true
    },

    {
      "name": "Kux-SpeedyBotStart",
      "enabled": true
    },

    {
      "name": "Kux-StartingPack1",
      "enabled": true
    },

    {
      "name": "Kux-UnderwaterPipes",
      "enabled": true
    },

    {
      "name": "Kux-WhatIsMissing",
      "enabled": true
    },

    {
      "name": "Kux-ZoomRunning",
      "enabled": true
    },

    {
      "name": "larger_shortcut_icons",
      "enabled": true
    },

    {
      "name": "manual-inventory-sort",
      "enabled": false
    },

    {
      "name": "micro-machines",
      "enabled": true
    },

    {
      "name": "mini-machines",
      "enabled": true
    },

    {
      "name": "Mining_Drones",
      "enabled": true
    },

    {
      "name": "Mini_Trains",
      "enabled": true
    },

    {
      "name": "ModuleInserterSimplified",
      "enabled": true
    },

    {
      "name": "Mower",
      "enabled": true
    },

    {
      "name": "naked-rails-f2",
      "enabled": true
    },

    {
      "name": "Nearby-Ammo-Count",
      "enabled": true
    },

    {
      "name": "packing-tape",
      "enabled": true
    },

    {
      "name": "pipe_plus",
      "enabled": false
    },

    {
      "name": "QueueToFrontLimited",
      "enabled": false
    },

    {
      "name": "RecipeLogisticRequest",
      "enabled": false
    },

    {
      "name": "Repair_Turret",
      "enabled": true
    },

    {
      "name": "resourceMarker",
      "enabled": true
    },

    {
      "name": "Reverse-Engineering",
      "enabled": true
    },

    {
      "name": "Shortcuts-ick",
      "enabled": true
    },

    {
      "name": "sign-post",
      "enabled": true
    },

    {
      "name": "Smart_Inserters",
      "enabled": true
    },

    {
      "name": "some-luaconsole",
      "enabled": true
    },

    {
      "name": "spotlight",
      "enabled": true
    },

    {
      "name": "TemporaryLogisticRequest",
      "enabled": false
    },

    {
      "name": "textplates",
      "enabled": true
    },

    {
      "name": "toolbars-mod",
      "enabled": true
    },

    {
      "name": "Transport_Drones_Meglinge_Fork",
      "enabled": true
    },

    {
      "name": "Warehousing",
      "enabled": true
    },

    {
      "name": "waterfill-2",
      "enabled": true
    },

    {
      "name": "WideChests",
      "enabled": true
    },

    {
      "name": "Wr_Enhanced_Map_Colors",
      "enabled": false
    },

    {
      "name": "yafla",
      "enabled": true
    },

    {
      "name": "ZY-God",
      "enabled": false
    },

    {
      "name": "zzz-Kux-PrototypeExport-Compose",
      "enabled": false
    }
  ]
}