Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
co sach » bo sach, cuon sach, hoc sach
xanh di » vanh dai, xanh tai
danh di » danh du, danh dien, danh gia
thuc va » thuc vat, thuc dan, thuc day
va cach » va cac
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
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: co sach y ((nang xa) or (nang ma)) hoi. hieu va cach thuc va ((danh di) or (xanh di)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach y ((nang xa) OR (nang ma)) hoi. hieu va cach thuc va ((danh di) OR (xanh di)) cua tre.
• Adding a wildcard symbol may retrieve word variants: co sach y ((nang xa) or (nang ma)) hoi. hieu va cach thuc va ((danh di) or (xanh di)) cua tre*.