Perhaps you should try some spelling variations:
duong kiem » duong kieu, luong kiem, duong vien
tinh dung » trinh dung, tin dung, tinh quang
hieu soat » hieu suat, hieu luat, hieu so
hieu hoat » hieu hoa, thien hoat, hieu luat
qua duong » quan duong, qua dung, qua dong
kiem soat » kiem toan
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: (( tinh dung luan van ((hieu soat) OR (hieu hoat)) ) or ( dinh duong qua duong kiem soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung luan van ((hieu soat) OR (hieu hoat)) ) OR ( dinh duong qua duong kiem soat )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tinh dung luan van ((hieu soat) OR (hieu hoat)) ) or ( dinh duong qua duong kiem soat ))".
• Adding a wildcard symbol may retrieve word variants: (( tinh dung luan van ((hieu soat) OR (hieu hoat)) ) or ( dinh duong qua duong kiem soat ))*.