Perhaps you should try some spelling variations:
dung quang » dang quang, dung quan, luong quang
dinh luong » dinh duong, dinh cuong, dinh quang
dinh huong » dinh duong, anh huong
quang van » quang ban, quan van, quang uan
hieu soat » hieu suat, hieu hoat, hieu luat
kiem soat » kiem toan
van hieu » cao hieu
luan va » luan van, luat va
va kiem » van kien
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 quang van hieu soat ) or ( ((dinh luong) OR (dinh huong)) luan va kiem soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung quang van hieu soat ) OR ( ((dinh luong) OR (dinh huong)) luan va kiem soat ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tin dung quang van hieu soat ) or ( ((dinh luong) OR (dinh huong)) luan va kiem soat ))*".