Perhaps you should try some spelling variations:
minh quang » tinh quang, minh hoang, minh tuan
quang quan » quang tuan, quang uan, quan quan
dinh quang » tinh quang, dinh duong, dinh huong
hieu suat » hieu luat, hieu qua
tien soat » trien hoat, thien hoat, kiem soat
quan van » luan van, quan va, quan luan
van hieu » cao hieu
tien hoa » dien hoa, trien hoat, tien va

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 quan van hieu suat ) or ( dinh quang quan van ((tien soat) or (tien hoa)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( minh quang quan van hieu suat ) OR ( dinh quang quan van ((tien soat) OR (tien hoa)) )).
• Adding a wildcard symbol may retrieve word variants: (( minh quang quan van hieu suat ) or ( dinh quang quan van ((tien soat) or (tien hoa)) ))*.