Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thu hang » thi hang, thuc hanh, thu huong
hieu van » hieu va, thien van, lieu va
lam duoc » nam duoc, luat duoc, lam thuoc
hang ky » hong ky, hanh ky, dang ky
van lam » van nam
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet

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

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