Occasionally when I run a search, the system tells me my search terms were too common. It doesn't actually say that when I search from the Social Groups page for "a third place", but it doesn't return any hits either.

That search does seem to work, otherwise. When I type in "bakers" it immediately finds "Cooks and Bakers Corner".

I gather it can find words (distinctive ones, at least) in the names of the social groups and the descriptions. When I try terms that I happen to know have been posted within the group, though, it doesn't find them.