@Jeremy *******
Again, after they told me they can't accept the document that they accepted the previous day, my first reaction was to ask for my passport back with the plan that I would just fly to Cambodia / Laos / Malaysia (I just came from Japan and it seemed difficult to do visas there, Canada is a bit far) but then the embassy staff talked me out of it by explaining that the house registration document is a few pages and the landlord must have just accidentally copied the wrong page. Hence, I left my passport with her and I'm now trapped in Hanoi until Monday at least.