Searching on the web
Photographer Arnaud Mooij, copyright UU

Tenants are quite often allowed to look for a new housemate through social media, or among their friends and fellow students. It is therefore good to inform your network when you are looking for a room. There are several Facebook groups in which people post available rooms and requests:

 

UUING Google group

You could also consider joining the UUING Gougle Group moderated by the International Neighbour Group (ING). This is an active Google community in which other internationals post ads, requests and available accommodation. You can find more info on how to join on the ING website.