Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh dai » hanh tai, hanh dao, vanh dai
va cham » va chat, va tham
cua tre » cua te, cuu tre, cua triet
y nang » ly nang, v nang, may nang
uoc va » nuoc va, duoc va, quoc va
luc va » duc va, tuc va, loc va
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((y nang) or (ky nang)) x hoi. lieu va cham ((uoc va) or (luc va)) hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((y nang) OR (ky nang)) x hoi. lieu va cham ((uoc va) OR (luc va)) hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) or (ky nang)) x hoi. lieu va cham ((uoc va) or (luc va)) hanh dai cua tre*.