In search of a housing from 2016 September - room(s), flatmate(s) "needed":)!

I am going to study a semester - or two - at the University of Amsterdam starting from September. I'd prefer to have my own room, but shared facilites. If the accomodation would be 30 minutes bike from center, it is still managable. I wonder if anyone could already offer anything for such an early request? Or, I suppose there happen to be out there some other people wishing the same conditions, so let's realize them together!
Thank you very much for your answer! With Regards, Kata