Perhaps you should try some spelling variations:
chien soat » thien hoat
hieu luat » hieu qua
tinh nang » trinh nang, tin nang, tich nang
nang quan » ban quan, nang suat
van chien » van hien, van tien
van hieu » cao hieu
quan van » quan va, quan luan, quan doan
luan » lan

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 luan van hieu luat ) or ( tinh nang quan van chien soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung luan van hieu luat ) OR ( tinh nang quan van chien soat )).
• Adding a wildcard symbol may retrieve word variants: (( tin dung luan van hieu luat ) or ( tinh nang quan van chien soat ))*.