Perhaps you should try some spelling variations:
tinh dung » trinh dung, tin dung, tinh quang
dung quan » dung quang, dung luan, luong quan
hieu soat » hieu suat, hieu luat, hieu so
hieu hoat » hieu hoa, thien hoat, hieu luat
dong kiem » dong kem, thong kiem, trong kiem
kiem soat » kiem toan
quan van » luan van, quan va, quan luan
qua dong » quan dong, qua duong, qua song
duong » huong

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