Perhaps you should try some spelling variations:
quang toan » quang tuan, quang tran, quang doan
kiem soat » kiem toan
dung land » dung luan, dung san, dung van
hieu soat » hieu suat, hieu hoat, hieu luat
dung lam » dung luan, dung tai, dung dat
toan van » tran van, toan ban, tan van
van hieu » cao hieu
va kiem » van kien

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 land) or (dung lam)) va kiem soat ) or ( tinh quang toan van hieu soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin ((dung land) OR (dung lam)) va kiem soat ) OR ( tinh quang toan van hieu soat )).
• Adding a wildcard symbol may retrieve word variants: (( tin ((dung land) or (dung lam)) va kiem soat ) or ( tinh quang toan van hieu soat ))*.