chầu (“to attend”) + trời (“heaven”).
chầu trời
- (folklore, occult, of a god) to attend the heavenly court of the Jade Emperor
thả cả chép, tiễn ông Táo lên chầu trời- to release a carp and give the Kitchen God a ride to heaven
- (humorous) Synonym of chết (“to die; to pass away”)