khỏi cần phải nói thêm 
to go without saying [ khỏi ] : (1) to avoid, escape from, not help but (do sth); (2) to recover (from illness)
[ cần ] : (1) to be urgent, pressing; to need (to), want; to care; (2) hard working, industrious; (3) rod, pole, staff; (4) celery
[ phải ] : (1) correct, right (opposite of left), right (opposite of wrong); (2) must, have to
[ nói ] : to speak, talk, say, tell
[ thêm ] : more, additional, further; to add, increase
Most Common Compounds Set 1:
Most Common Compounds Set 2 :