Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hanh dai » hanh tai, hanh dao, vanh dai
sach ty » sach tu, sach thu, xach tay
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
anh ta » anh tu, anh va, anh tuan
va nam » van nam, ha nam, va nay
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((((sach ty) or (anh ta))) or (sach y)) nang x hoi. lieu va nam thuc va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((((sach ty) OR (anh ta))) OR (sach y)) nang x hoi. lieu va nam thuc va hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: toc ((((sach ty) or (anh ta))) or (sach y)) nang x hoi. lieu va nam thuc va hanh dai cua tre*.