Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
loai ban » loai san, loai lan, loai bien
loai van » loai va, loai san, lai van
hanh vai » hanh vi, hanh va, hanh tai
te sach » toc sach
hieu ve » hieu va, hieu van
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac

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) or (te sach)) ky nang x ho. hieu ve cac ((loai ban) or (loai van)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (te sach)) ky nang x ho. hieu ve cac ((loai ban) OR (loai van)) hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (te sach)) ky nang x ho. hieu ve cac ((loai ban) or (loai van)) hanh vai cua tre*.