Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
toc sach » hoc sach, doc sach, thuoc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, duc va
x hoi » xa hoi, o hoi, 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: toc sach ty nang ((x hoi) or (x ho)). lieu va cam ((tuc va) or (tuc xa)) hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang ((x hoi) OR (x ho)). lieu va cam ((tuc va) OR (tuc xa)) hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang ((x hoi) or (x ho)). lieu va cam ((tuc va) or (tuc xa)) hanh dai cua tre*.