Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh doi » thanh doi, hanh noi, hang doi
va tham » van tham, va cham, va thanh
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
y nang » ly nang, v nang, may nang
doc va » duoc va, hoc va, duc va
loc va » hoc va, luc 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 tham ((doc va) or (loc va)) hanh doi 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 tham ((doc va) OR (loc va)) hanh doi cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) or (ky nang)) x hoi. lieu va tham ((doc va) or (loc va)) hanh doi cua tre*.