Perhaps you should try some spelling variations:
luong quang » luong quan, dung quang
minh luong » dinh luong, minh tuong, minh cuong
dung quan » dung quang, dung luan, luong quan
hieu soat » hieu hoat, hieu luat, kiem soat
hieu suat » hieu luat, hieu qua
quang van » quang ban, quang uan, quang va
quan van » luan van, quan va, quan luan
van kien » van tien, van hien, van chien
kien hoa » dien hoa, tien hoa, kien ha
tin » tinh

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

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