Perhaps you should try some spelling variations:
huong lquan » luong quan, vuong quan, hong quan
cuong quan » luong quan, vuong quan, luong quang
hieu suat » hieu luat, hieu qua
quang uan » quang tuan, quang ban, quang tran
kiem soat » kiem toan
van hieu » cao hieu
van kiem » va kiem, van kien, van hien
uan van » luan van, quan van, tan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( anh ((huong lquan) OR (cuong quan)) van hieu suat ) or ( tinh quang uan van kiem soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( anh ((huong lquan) OR (cuong quan)) van hieu suat ) OR ( tinh quang uan van kiem soat )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( anh ((huong lquan) OR (cuong quan)) van hieu suat ) or ( tinh quang uan van kiem soat ))".
• Adding a wildcard symbol may retrieve word variants: (( anh ((huong lquan) OR (cuong quan)) van hieu suat ) or ( tinh quang uan van kiem soat ))*.