Perhaps you should try some spelling variations:
huong quang » phuong quang, thuong quang, luong quang
tinh huong » dinh huong, tinh quang, anh huong
tinh dung » trinh dung, tin dung, tinh quang
hieu soat » hieu suat, hieu luat, hieu so
hieu hoat » hieu hoa, thien hoat, hieu luat
quang van » quang ban, quan van, quang uan
kiem soat » kiem toan
van kiem » va kiem, van kien, van hieu
luan » quan, lan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung luan van ((hieu soat) OR (hieu hoat)) ) OR ( tinh huong quang van kiem soat ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tinh dung luan van ((hieu soat) OR (hieu hoat)) ) or ( tinh huong quang van kiem soat ))~".
• Adding a wildcard symbol may retrieve word variants: (( tinh dung luan van ((hieu soat) OR (hieu hoat)) ) or ( tinh huong quang van kiem soat ))*.