Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
thu dang » thu hang, thu bang, thu dong
tu cach » tu cac
vai cua » dai cua, hai cua, lai cua
cham ly » cam ly, cham lai
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
xay hoi » tay hoi, cay phoi, gay thoi
tu dang » tu dong, su dang, vu dang
ly van » le van, ly va, ly von

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 dang) OR (thu dang)) ((xay hoi) or (xa hoi)). hieu ve cham ly van hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach ((tu dang) OR (thu dang)) ((xay hoi) OR (xa hoi)). hieu ve cham ly van hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cach ((tu dang) OR (thu dang)) ((xay hoi) or (xa hoi)). hieu ve cham ly van hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu cach ((tu dang) OR (thu dang)) ((xay hoi) or (xa hoi)). hieu ve cham ly van hanh vai cua tre*.