Hey, yeah I managed to find all of those; I was missing the one from under the rug in the central room. This time I got a couple more pieces, but I'm stuck again. I did get the pieces at the toilet, table and bed; though I couldn't complete the next photo.
Did you use the key to open the closet? And the one when you close the door inside the bedroom?
Yeah, I got the one in the closet. Though, I didn't realise that there are also hidden pieces that can only be accessed by closing doors. I would say that's not very intuitive to players.