Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
toc sach » hoc sach, doc sach, nuoc sach
hieu va » lieu va, hieu qua
nam tuc » nam thuc, nam truc, nam tu
va tinh » may tinh
dai cuu » dai cua, dai huu
cuu tre » cua tre, cau tren, cau treo
va nam » van nam, ha nam, va nay
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: ((thuoc sach) or (toc sach)) ky nang x hoi. hieu va nam tuc ((le thanh) or (va tinh)) dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (toc sach)) ky nang x hoi. hieu va nam tuc ((le thanh) OR (va tinh)) dai cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (toc sach)) ky nang x hoi. hieu va nam tuc ((le thanh) or (va tinh)) dai cuu tre*.