Perhaps you should try some spelling variations:
minh quang » tinh quang, dinh quang, minh hoang
quang dang » quang dung, quang dong, quang hoang
dung quang » dang quang, dung quan, luong quang
hieu soat » hieu suat, hieu hoat, kiem soat
hieu luat » hieu qua
tien hoat » trien hoat, thien hoat, tien hoa
dang van » hoang van, hang va
quang va » quang van, quan va, quang ma
va tien » van tien, va tieng, va trien

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( minh quang dang van ((hieu soat) or (hieu luat)) ) or ( trinh dung quang va tien hoat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( minh quang dang van ((hieu soat) OR (hieu luat)) ) OR ( trinh dung quang va tien hoat )).
• Adding a wildcard symbol may retrieve word variants: (( minh quang dang van ((hieu soat) or (hieu luat)) ) or ( trinh dung quang va tien hoat ))*.