Perhaps you should try some spelling variations:
luong quang » luong quan
dung quang » dang quang, dung quan, dung luan
minh tuong » minh tuan, minh quang
tuong quan » truong quan, thong quan, luong quan
hieu soat » hieu suat, hieu hoat, hieu luat
kiem soat » kiem toan
van hieu » cao hieu
quan vi » quan li, quan tri, quan doi
vi kiem » va kiem, bi kiem, ve kiem

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

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