Comment 4 for bug 921068

Agreed, it does seem to be any full word (or at least any I've tried).

The first one I tried (because I know it's got a lot of complex menus) was inkscape.

Try searching for "layers".

"lay" gets you some matches (only 3 out of 5 seem to be actually relevant).

Complete the word as "layers" and the results go completely blank.