Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thuc day » thuc dan, thuc vat
nam thuc » nam thuoc, am thuc, nam thu
sach tay » xach tay, sach hay, sach nay
vai cuu » vai cua
dan vai » dan va, dan tai, dan vat
day dan » day danh, dao dan, cay dan
hieu va » lieu va
lang xa » dang xay, lang van
lang ha » long ha
cuu tre » cua tre, cau tren, cau treo

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 tay ((lang xa) or (lang ha)) hoi. ((hieu va) or (hieu qua)) nam thuc day dan vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tay ((lang xa) OR (lang ha)) hoi. ((hieu va) OR (hieu qua)) nam thuc day dan vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc sach tay ((lang xa) or (lang ha)) hoi. ((hieu va) or (hieu qua)) nam thuc day dan vai cuu tre*.