Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van thai » van thoai, van tai, van hai
thai tuc » thai thuc, thai thuy, thai hoc
danh lai » danh sai, gianh lai, dinh lam
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
xa danh » va danh, dia danh, nam danh
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
x hoi » o hoi, x ho, 5 hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang ((x hoi) or (xa hoi)). hieu van thai tuc xa danh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((x hoi) OR (xa hoi)). hieu van thai tuc xa danh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((x hoi) or (xa hoi)). hieu van thai tuc xa danh lai cua tre*.