Perhaps you should try some spelling variations:
hanh vai » hanh va, hanh tai, hanh van
tu cach » tu cac
cach tu » cach thuc
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
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 tu dong ((xay hoi) or (xa hoi)). hieu ve cham le van ((hanh vai) OR (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach tu dong ((xay hoi) OR (xa hoi)). hieu ve cham le van ((hanh vai) OR (hanh vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cach tu dong ((xay hoi) or (xa hoi)). hieu ve cham le van ((hanh vai) OR (hanh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu cach tu dong ((xay hoi) or (xa hoi)). hieu ve cham le van ((hanh vai) OR (hanh vi)) cua tre*.