like: nhóm đối chứng
Intermediate Level Advanced Level
Composite Words Listening Comprehension Oxford Topics Duolingo Topics 315 Activities
BEGINNER LEVEL
exact:
VNEN 
nhóm đối chứng * ☊ 
control group * ☊
[ nhóm ] : to gather, group, collect; group
[ đối ] : (1) couple; (2) to apply; (3) opposing, anti-
[ chứng ] : disease, ailment, symptom, sickness, illness; proof, evidence
[ nhóm ] : group