Unable to search any discussions with keywords on the forum

Hi,

I am unable to find any discussions using search options. What ever i search it says there is no discussion with this term, i tried even the most common one (voronoi). Wanted to ask if there is a change in the way search and discussions works as i was away from the forum for about 6 months, as I remember when i last was here there was a little bit of restructuring in progress.