Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
cam thuc » am thuc, nam thuc, cam thu
so sach » so sanh, bo sach, co sach
danh di » danh du, xanh di, danh dien
sach ty » sach y, sach tu, sach thu
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty ((nang xa) OR (lang xa)) hoi. hieu va cam thuc dan ((hanh vi) or (danh di)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((nang xa) OR (lang xa)) hoi. hieu va cam thuc dan ((hanh vi) OR (danh di)) cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty ((nang xa) OR (lang xa)) hoi. hieu va cam thuc dan ((hanh vi) or (danh di)) cuu tre*".