Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
truc va » thuc va, thuc vat, trung va
vai cua » dai cua, hai cua, lai cua
van cac » van hac, van cau, van bac
nang xa » nang x, lang xa, nang ma
tuc va » thuc va, tuc xa, duc va
su cac » tu cac, su cao, su can
su sac » su sach, su xac

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