Perhaps you should try some spelling variations:
luong quang » luong quan, dung quang
tinh cuong » dinh cuong, tinh huong, minh cuong
cuong quan » luong quan, vuong quan, thong quan
hieu soat » hieu suat, hieu hoat, hieu luat
kiem soat » kiem toan
van hieu » cao hieu
quan van » luan van, quan va, quan luan
van kiem » va kiem, van kien, van hien

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

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