Looking for an apartment for 2 in Amsterdam

My fiend and I are looking for an apartment relatively close to the VU campus. We are from Argentina and South africa. Our rental budget can change if the apartment has 3 bedrooms sice we know annother person who could join us.  We also need the appartment to have a minimum of 2 registration possibilities. We are pretty organized and responsable students that could contribute in anything that the apartment might need.