Perhaps you should try some spelling variations:
ban thanh » ban hang
ban hanh » ban hang
tang van » dang van, hoang van, trong van
cua tre » cua te, cuu tre, cua triet
cam dua » ca dua, cay dua, chay dua
hai cua » thai cua, dai cua, hoi cua
hieu ve » hieu va, hieu van
van hoi » van hoa, van hoc, van hoe
ky tang » ky nang, ky dang, kho tang
ve cam » ve cham, ve cac, va cam
su xac » su cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su xac) OR (pu xac)) ky tang van hoi. hieu ve cam dua ((ban thanh) or (ban hanh)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su xac) OR (pu xac)) ky tang van hoi. hieu ve cam dua ((ban thanh) OR (ban hanh)) hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su xac) OR (pu xac)) ky tang van hoi. hieu ve cam dua ((ban thanh) or (ban hanh)) hai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su xac) OR (pu xac)) ky tang van hoi. hieu ve cam dua ((ban thanh) or (ban hanh)) hai cua tre*.