Perhaps you should try some spelling variations:
dung thang » hung thang, cung thang, dung thuong
chien soat » thien hoat
thang van » tang van, thanh van, thong van
hieu soat » hieu suat, hieu hoat, kiem soat
hieu luat » hieu qua
dung quan » dung quang, dung luan, luong quan
van chien » van hien, van hieu, van tien
quan van » luan van, quan va, quan luan
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 thang van ((hieu soat) or (hieu luat)) ) or ( trinh dung quan van chien soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung thang van ((hieu soat) OR (hieu luat)) ) OR ( trinh dung quan van chien soat )).
• Adding a wildcard symbol may retrieve word variants: (( tin dung thang van ((hieu soat) or (hieu luat)) ) or ( trinh dung quan van chien soat ))*.