lễ thăng thiên 
Holy Thursday, Ascension [ lễ ] : religious ceremonies, festival, holiday
[ thăng ] : (1) to promote; (2) to come out of (a trance)
[ thiên ] : (1) thousand; (2) partial (to), favorable, pro-(something); (3) heaven, sky, God, heavenly, divine, celestial; (4) (classifier for articles, novels, chapters); (5) to move, shift, change; (6) section, part, piece
Most Common Compounds Set 1:
Most Common Compounds Set 2 :