Perhaps you should try some spelling variations:
dung quang » dang quang, dung quan, luong quang
tinh luong » tinh huong, dinh luong, minh luong
luong quan » thong quan, duong qua
tinh dung » trinh dung, tin dung, tinh quang
quang van » quang ban, quang uan, quang va
hieu soat » hieu suat, hieu hoat, hieu luat
kiem toan » ke toan, kiem tra
van hieu » cao hieu
quan van » luan van, quan va, quan luan

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 quang van hieu soat ) OR ( tinh luong quan van ((kiem soat) OR (kiem toan)) ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tinh dung quang van hieu soat ) or ( tinh luong quan van ((kiem soat) OR (kiem toan)) ))~".
• Adding a wildcard symbol may retrieve word variants: (( tinh dung quang van hieu soat ) or ( tinh luong quan van ((kiem soat) OR (kiem toan)) ))*.