Search not working when searching for video series

Search does not seem to be working properly when searching for video series.

Fx, when searching for "Vim Mastery", the type-ahead / hinting works nicely... http://pasteboard.co/mIKYHVWO.png

But when the search is actually performed, completely irrelevant results are returned, none of which includes the series being searched: http://pasteboard.co/mJIKckUM.png

Cheers,

SC