Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » thuat sach, thu hoach, khau sach
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
tu sach » su sach, te sach, tu cach
nam tuc » nam thuc, nam truc, nam tu
xa hanh » xa thanh, xa khanh, va hanh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
ty ang » ty xang, ty hang, ty anh
ang xa » lang xa, mang xa, dang xay

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 sach) OR (((thu sach) OR (thuoc sach)))) ty ang xa hoi. hieu van nam tuc xa hanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (((thu sach) OR (thuoc sach)))) ty ang xa hoi. hieu van nam tuc xa hanh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (((thu sach) OR (thuoc sach)))) ty ang xa hoi. hieu van nam tuc xa hanh vai cua tre*.