Perhaps you should try some spelling variations:
tinh huong » dinh huong, anh huong
huong quan » luong quan, cuong quan, vuong quan
quang tran » quang tuan, quang trung, quang thanh
hieu suat » hieu luat
kiem soat » kiem toan
tran van » luan van
van kiem » va kiem, van kien, van hieu
quan va » quan vi, quan ha, luan va

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

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