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

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (hoc sach)) ty nang x ho. lieu va cam ((tuc va) or (tuc xa)) hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ty nang x ho. lieu va cam ((tuc va) OR (tuc xa)) hanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) ty nang x ho. lieu va cam ((tuc va) or (tuc xa)) hanh lai cua tre*.