When I try to find props using Search it only gives 128 props. Is there any way I can increase that limit?
GarrysMod\garrysmod\gamemodes\sandbox\gamemode\cl_search_models.lua line 62: change this to what you need.
max. is 1024, until you change the lua/includes/utils/search.lua if #results > 1024 then return end to a higher value.
to do this on any server, you have to write your own search menu, because the edited files will not be loaded, just the files from server.