Perhaps you should try some spelling variations:
cac thuc » cach thuc, cac thu, can thuc
so sach » so sanh, co sach, hoc sach
xanh di » danh di, vanh dai, xanh tai
va xanh » va danh, va hanh, va anh
thuc va » thuc vat, thuc dan, thuc day
nang ma » tang ma, sang ma, nang cao
bo sach » co sach, hoc sach
nang xa » nang x, lang xa, mang xa
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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