Baboon flagged this up - there is a problem with Google Search on this site, in that it doesn't produce any results. I'll get someone onto it, but in the meantime you can also use the "content" search tab that appears alongside the "Google" tab in the results page.
Yeah there's a problem with custome search. What I did is I try the google + and I manage to search. Google + button is beside the search when its blank :D