Perhaps you should try some spelling variations:
nang hai » hang hai, nang tai, dang hai
hieu van » hieu va, thien van, lieu va
lam duoc » nam duoc, luat duoc, lam thuoc
va thanh » gia thanh, ban thanh, le thanh
hai hoi » dai hoi, hai moi, hai hai
van lam » van nam
va tinh » may tinh
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
su cac » tu cac, su cao, su can

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su cac ky nang hai hoi. hieu van lam duoc ((va thanh) or (va tinh)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky nang hai hoi. hieu van lam duoc ((va thanh) OR (va tinh)) hai cua tre.
• Adding a wildcard symbol may retrieve word variants: su cac ky nang hai hoi. hieu van lam duoc ((va thanh) or (va tinh)) hai cua tre*.