Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thuc day » thuc dan, thuc vat
dang xay » dang van, van xay
nam thuc » nam thuoc, am thuc, nam thu
vai cuu » vai cua
dan vai » dan va, dan tai, dan vat
day dan » day danh, dao dan, cay dan
hieu va » hieu qua
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, lang van
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: thuoc sach ky ((lang xa) OR (dang xay)) hoi. ((hieu va) or (lieu va)) nam thuc day dan vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky ((lang xa) OR (dang xay)) hoi. ((hieu va) OR (lieu va)) nam thuc day dan vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky ((lang xa) OR (dang xay)) hoi. ((hieu va) or (lieu va)) nam thuc day dan vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky ((lang xa) OR (dang xay)) hoi. ((hieu va) or (lieu va)) nam thuc day dan vai cuu tre*.