Why does it seem like the "search" ability for these forums is so backward?

I don't seem to find any way to search just one forum or to limit the search terms to either "or" or "and".

Or is there some way to do such searches but it's just impossible to find any instructions?

There doesn't seem to be any way to do something as simple as search for all entries with "dwarf" in the "Warhammer Invasion" forums, for example. If you put in those words you get any instance of any term (such as anywhere "dwarf" appears in all forums! Hardly helpful.

Simple full text searching across large amounts of entries is NOT helpful. 500 hits when you have a specific question is not useful.

A disappointed librarian,

Roke