Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
va thanh » gia thanh, va tinh, le thanh
dau hoi » cau hoi, dan hoi, dau noi
dai hoi » dai hoc, dai hai, dai moi
hieu ve » hieu va, hieu van
cao duc » dao duc, cao suc, giao duc
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
ve cao » va cao, ve bao, ve cac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang ((dau hoi) OR (dai hoi)). hieu ve cao duc ((va thanh) OR (ban thanh)) vai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang ((dau hoi) OR (dai hoi)). hieu ve cao duc ((va thanh) or (ban thanh)) vai cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ((dau hoi) OR (dai hoi)). hieu ve cao duc ((va thanh) or (ban thanh)) vai cuu tre*.