Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hieu van » hieu va, thien van, hieu ve
gian cua » gian xu, ban cua
sach ky » sac ky, sach y, sach ty
van anh » van thanh, van minh
cua tre » cua te, cuu tre, cua triet
cac bo » bac bo, cac co
x hoi » xa hoi, o hoi, x ho
tuan » quan, tran, luan

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky nang x hoi. ((hieu van) or (lieu va)) cac bo ((van anh) or (tuan anh)) gian cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky nang x hoi. ((hieu van) OR (lieu va)) cac bo ((van anh) OR (tuan anh)) gian cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky nang x hoi. ((hieu van) or (lieu va)) cac bo ((van anh) or (tuan anh)) gian cua tre*.