một cách lịch sự 
politely [ một ] : one; a, an
[ cách ] : (1) distant, distance from, separated by; (2) way, manner, fashion, method; (3) to change, alter
[ lịch ] : calendar, agenda; to pass, experiment
[ sự ] : deed, act, action event, occurrence, (classifier for actions, states)
Most Common Compounds Set 1:
Most Common Compounds Set 2 :