Your mod blocks the nei search. So i can´t search for my blocks and machines. After deleted your mod out of my mods folder i can search normally in nei. I play on Minecraft 1.7.10

@skulldrago Make sure the debug mode is off in the config and maybe activate the prefixes? That should disable the search filters without using the prefixes

Thank you i have tried it . The colour prefix option was false i have changed it to true and now the search is function normally.