Perhaps you should try some spelling variations:
dang quang » dung quang, nang quan
hieu soat » hieu suat, hieu hoat, hieu luat
dang hung » manh hung, dang cong, van hung
diem soan » kiem toan, kiem soat, bien soan
van hieu » cao hieu
hai diem » dac diem, hai lien, mai dien
luan » quan, lan

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( trinh dung luan van hieu soat ) or ( tin ((dang quang) OR (dang hung)) hai diem soan ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( trinh dung luan van hieu soat ) OR ( tin ((dang quang) OR (dang hung)) hai diem soan )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( trinh dung luan van hieu soat ) or ( tin ((dang quang) OR (dang hung)) hai diem soan ))".
• Adding a wildcard symbol may retrieve word variants: (( trinh dung luan van hieu soat ) or ( tin ((dang quang) OR (dang hung)) hai diem soan ))*.