Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
toc sach » hoc sach, doc sach, nuoc sach
hanh lai » hanh lam, hanh tai, thanh lap
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
ty nang » ky nang, ty xang, ty hang
tuc va » thuc va, truc va, duc va
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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: ((toc sach) OR (thuoc sach)) ty nang x hoi. lieu va cam ((tuc va) OR (tuc xa)) hanh lai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (thuoc sach)) ty nang x hoi. lieu va cam ((tuc va) or (tuc xa)) hanh lai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (thuoc sach)) ty nang x hoi. lieu va cam ((tuc va) or (tuc xa)) hanh lai cua tre*.