Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
hanh de » hanh ve, hanh kem
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
cuu tre » cua tre, cau tren, cau treo
hieu va » hieu qua
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
de cuu » de cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu ((nang xa) OR (lang xa)) hoi. ((hieu va) OR (lieu va)) cham thuc va hanh de cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu ((nang xa) or (lang xa)) hoi. ((hieu va) OR (lieu va)) cham thuc va hanh de cuu tre~".
• Adding a wildcard symbol may retrieve word variants: te sach tu ((nang xa) or (lang xa)) hoi. ((hieu va) OR (lieu va)) cham thuc va hanh de cuu tre*.