Hi. I 'm hoping I can get a little advice. I have a place on the wall of a bedroom where the drywall constantly cracks. It starts by the window frame and splits down the corner of the room (sse pic).

I've spackled and painted it a number of times, but eventually (after a month or two) the crack reappears. I think the biggest culprit causing the recrack, is when large trucks rumble down a nearby street and make the house tremble a bit.

Any tips on a permanent fix? -outside of replacing a whole big chunk of the the drywall (I don't have the skill or the money for that right now.) Thanks for any help.