tác dụng hóa học 
chemical action [ tác ] : (1) job, task, work; (2) to make, do
[ dụng ] : to use, employ
[ hóa ] : (1) merchandise, goods; (2) to change into, become -ize, -ify
[ học ] : to study, learn (how to); field of study
Most Common Compounds Set 1:
Most Common Compounds Set 2 :