Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
hanh vai » hanh vi, hanh va, hanh tai
cua tre » cua te, cuu tre, cua triet
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cac luc » cau luc, coc luc, cac nuoc
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » lieu va, hieu qua
luc va » duc va, tuc va, loc va
va xay » va xac
sac ky » cac ky, sai ky

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 ((sac ly) OR (sac ky)) va xay hoi. ((hieu va) OR (hieu van)) cac luc va hanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ly) OR (sac ky)) va xay hoi. ((hieu va) or (hieu van)) cac luc va hanh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ly) OR (sac ky)) va xay hoi. ((hieu va) or (hieu van)) cac luc va hanh vai cua tre*.