I searched for a certain movie. Found about 80 hits. Downloaded one succesfully, but it was not exactly what i wanted. Searched again, same movie title: this time only 13 hits: only .mov files and some .torrent. No more avi. I tried again and again. No change. When I type in other titles there are avi results. Any ideas?

The movie you are looking for isn't out yet. The thing you keep finding is an R6 i.e. Chinese pre retail. They have cut out all parts which in any way can make Chinese government look bad. As per discussion elsewhere more than 13 minutes of the movie stripped away.

My advise is either go to the cinema to watch it or wait for a while.