Perhaps you should try some spelling variations:
trinh nang » tinh nang, trinh bang, trinh mang
hieu hoat » hieu hoa, thien hoat, hieu luat
tien soat » trien hoat, thien hoat, kiem soat
dung lam » dung tai, dung dat, dung ha
van hieu » cao hieu
suat va » xuat va
va tien » van tien, va tieng, va trien

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tinh ((dung luan) or (dung lam)) van hieu hoat ) or ( trinh nang suat va tien soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh ((dung luan) OR (dung lam)) van hieu hoat ) OR ( trinh nang suat va tien soat )).
• Adding a wildcard symbol may retrieve word variants: (( tinh ((dung luan) or (dung lam)) van hieu hoat ) or ( trinh nang suat va tien soat ))*.