Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
tu cach » tu cac
cach su » cach tu, hoach su
su dang » su dung
xay hoi » tay hoi, cay phoi, gay thoi
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cham le » pham le, cham den, cham lai
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: tu cach su dang ((xay hoi) or (xa hoi)). hieu ve cham le van hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach su dang ((xay hoi) OR (xa hoi)). hieu ve cham le van hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu cach su dang ((xay hoi) or (xa hoi)). hieu ve cham le van hanh vai cua tre*.