I am having the same problems as starforce when it comes to searching battleclinic.
The search box searches on title & author.
At this time, there are no plans to develop the search beyond what it does now.
I understand that there are no plans to expand search functions, but I think that there is a small albeit growing sense of frustration with the search functions. I for one would love to see a an optional breakdown of authors (modeller, texturer, etc) We have a lot of group projects going on - plus there are people who take advantage of the ambiguity and upload a model which they did nothing on, but they are the author.
A break down of classes might be a neat thing too: light cruiser, frigate, destroyer. The problem with that is that people have different definitions on what is what - so I don't know if its plausible. I know that in the past when I searched for "Enterprise" it wouldn't find things that are labelled "U.S.S. Enterprise" (that may be a bad example, but there are certainly gaps in what the search engine was capable of).
A breakdown of eras: TOS, TMP, TNG, Post-TNG, Abrams-TOS, Other might also be a good idea.