làm những việc bậy bạ 
to do objectionable things [ làm ] : to do, work, make, function as, serve; to cause something to happen
[ những ] : (pluralizer); several, various; to be only; certain number of, some; as much as, as many as
[ việc ] : affair, thing, work, job, matter, business, idea
[ bậy ] : wrong, illogical, irrational, obscene, bad, brazen
[ bạ ] : (1) randomly, at random, haphazard; (2) to register, record; (3) register, ledger, account book
Most Common Compounds Set 1:
Most Common Compounds Set 2 :