bang giao chính thức 
formal relations [ bang ] : (1) state, country, nation; (2) to help, protect, assist
[ giao ] : to entrust, bestow, deliver, join, exchange, communicate
[ chính ] : main, principle, chief; self, own; exactly, just, precisely
[ thức ] : (1) manner, form, pattern; (2) to wake, awaken
Most Common Compounds Set 1:
Most Common Compounds Set 2 :