Yes, the search box doesn't really work.
For it to be useful, we need an advanced search page where we can refine the search parameter, like search in a specific subforum (and/or language), NOT clause, maybe before/after a date, posts by a specific author... pretty much what almost any other forum engine provides.
By the way, if you think answering "dude, use search, it was suggested a trillion times!", current search is useless and a total waste of time. Hence, the suggestion. Get over it.
The search works fine for me. What part are you having trouble with? I know its definitely not the greatest just by how it works but its still usable.