Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
van cac » van hac, van cau, van bac
cac tuc » cac toc, cac tu, cac tac
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
su sac » su sach, su cac, su xac
su cao » cu cao, vu cao, su co
tuc va » thuc va, truc va, tuc xa
x hoi » o hoi, x ho, 5 hoi

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