Can, or should not, GrabCAD support Boolean searches in the Library?

WITH millions of models now in the GrabCAD Library, a search can easily yield 100s or thousands of models. Searching would be more efficient if Boolean searches were possible, in a similar way that eBay supports.

When attempting to put a minus sign in front of a term not wanted, GrabCad appears to ignore it and considers it to be another term wanted, rather than a term to be discarded.

eBay supports bracketing, and OR, AND and NOT operators, but even a simple 'NOT' operator would be helpful in GrabCAD.

Am I missing something?!