Drywall ceiling crack emanating from/near the outside corner of two interior drywall walls
Could be a problem with the structure in the ceiling, or a problem with how the drywall was attached to structure. An imperfect but easy first attempt might be to add some screws into structure near the cracks, then patch with compound and tape. If cracks appear again after a couple of years, you have a structural issue and probably need to rip out the existing drywall to address that. If not, the likely cause was either some initial settling of the house.