Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
toc sach » hoc sach, doc sach, thuoc sach
nam thuc » nam thuoc, am thuc, nam thu
dong vat » dong va, dong von, dong ha
dao dong » lao dong, ha dong, bat dong
thuc dao » thuc dan, thuc day, chuc dao
cau treo » cau theo, cau tren, cau triet
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cuu tre » cua tre, cau tren
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (nuoc sach)) ky lang xa hoi. hieu va nam thuc dao dong vat ((cuu tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (nuoc sach)) ky lang xa hoi. hieu va nam thuc dao dong vat ((cuu tre) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (nuoc sach)) ky lang xa hoi. hieu va nam thuc dao dong vat ((cuu tre) or (cau treo))*.