Perhaps you should try some spelling variations:
hieu suat » hieu luat, hieu qua
dung land » dung luan, dung lam, dung san
dung quan » dung quang, dung luan, luong quan
kiem soat » kiem toan
dung lan » dung luan, dung lam, dung san
van hieu » cao hieu
quan van » luan van, quan va, quan luan
van kiem » va kiem, van kien, van hien

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

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