Perhaps you should try some spelling variations:
luong quang » luong quan, dung quang
trinh quan » tinh quang, trinh luat, trinh han
dinh luong » dinh duong, dinh huong, dinh cuong
quang hoan » quang hoang, quang doan, quang toan
hieu soat » hieu suat, hieu hoat, hieu luat
hoan kiem » toan kiem, hoang kim, van kiem
kiem soat » kiem toan
van hieu » cao hieu
luan » lan

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

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