Perhaps you should try some spelling variations:
cac thuc » cach thuc, cac thu, can thuc
danh doi » danh di, thanh doi, dung doi
so sach » so sanh, bo sach, co sach
lang xa » lang ha, dang xay, lang van
nang ma » tang ma, sang ma, nang cao
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet

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 y ((lang xa) or (nang ma)) hoi. lieu va cac thuc va danh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((lang xa) OR (nang ma)) hoi. lieu va cac thuc va danh doi cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach y ((lang xa) or (nang ma)) hoi. lieu va cac thuc va danh doi cua tre*.