Perhaps you should try some spelling variations:
tinh nang » trinh nang, tin nang, tich nang
nang quan » ban quan, nang suat
kien soat » kiem soat, bien soan, kien hoa
dung san » dong san, dung sai, dung luan
dung lan » dung luan, dung land, dung lam
van hieu » cao hieu
quan va » quan vi, quan ha, luan va
va kien » van kien, va lien, va dien

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( tin ((dung san) or (dung lan)) van hieu qua ) or ( tinh nang quan va kien soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin ((dung san) OR (dung lan)) van hieu qua ) OR ( tinh nang quan va kien soat )).
• Adding a wildcard symbol may retrieve word variants: (( tin ((dung san) or (dung lan)) van hieu qua ) or ( tinh nang quan va kien soat ))*.