Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
van thanh » van tuan
tu cach » tu cac
cham ly » cam ly, cham lai
vai cua » dai cua, hai cua, lai cua
cach tu » cach thuc
hieu va » hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
cua tre » cua te, cuu tre, cua triet
tu van » tu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach tu van xay hoi. ((hieu va) or (lieu va)) cham ly ((van thanh) OR (ban thanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach tu van xay hoi. ((hieu va) OR (lieu va)) cham ly ((van thanh) OR (ban thanh)) vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cach tu van xay hoi. ((hieu va) or (lieu va)) cham ly ((van thanh) OR (ban thanh)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu cach tu van xay hoi. ((hieu va) or (lieu va)) cham ly ((van thanh) OR (ban thanh)) vai cua tre*.