chiến lược nâng cấp 
upgrade strategy [ chiến ] : (1) conflict, war; (2) good, terrific
[ lược ] : comb; to pick up, gather (news), have (results)
[ nâng ] : to raise, support, lift, pick up
[ cấp ] : (1) degree, grade, level, rank, step; (2) to confer, obtain, get, issue; (3) urgent, pressing
Most Common Compounds Set 1:
Most Common Compounds Set 2 :