Perhaps you should try some spelling variations:
hieu hoat » hieu hoa, thien hoat, hieu luat
tinh nang » trinh nang, tin nang, tich nang
nang quan » ban quan, nang suat
tien soat » trien hoat, thien hoat, kiem soat
dung lan » dung luan, dung land, dung san
dung lam » dung luan, dung tai, dung dat
van hieu » cao hieu
quan ha » quan he
ha tien » ho tien, va tien, phan tien

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 lan) or (dung lam)) van hieu hoat ) or ( tinh nang quan ha tien soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin ((dung lan) OR (dung lam)) van hieu hoat ) OR ( tinh nang quan ha tien soat )).
• Adding a wildcard symbol may retrieve word variants: (( tin ((dung lan) or (dung lam)) van hieu hoat ) or ( tinh nang quan ha tien soat ))*.