Perhaps you should try some spelling variations:
tinh dung » trinh dung, tin dung, tinh quang
hieu hoat » thien hoat, hieu luat, hieu suat
dung kien » dung tien, dung dien, dung vien
kien soat » kiem soat, bien soan, kien hoa
hieu hoa » tieu hoa, dieu hoa, hiep hoa
qua dung » quang dung, su dung, qua song
luan » quan, lan
duong » huong, dong

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 hoat) or (hieu hoa)) ) or ( dinh duong qua dung kien soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung luan van ((hieu hoat) OR (hieu hoa)) ) OR ( dinh duong qua dung kien soat )).
• Adding a wildcard symbol may retrieve word variants: (( tinh dung luan van ((hieu hoat) or (hieu hoa)) ) or ( dinh duong qua dung kien soat ))*.