Actually, I suspect you are looking at the default
Multi Content search tab. That one doesn't work well for me. Instead, once you have that page open, click the
Single Content tab to the left.
Once you get search options figured out, you can click the
Save Search Preferences at the bottom to make those settings the default for you.
Note that this search function will not search for 3 letter (or less) words. Your only option for that is the
Google Custom Search on the homepage:
http://www.beesource.com/
But this search has no options for searching by member name.