Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam thuc » nam thuoc, am thuc, nam thu
danh lai » danh sai, gianh lai, dinh lam
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
co sach » bo sach, cuon sach, hoc sach
lai cua » dai cua, hai cua, lai chau
so sach » so sanh, bo sach, hoc sach
ve nam » he nam, va nam, le nam

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 (co sach)) y ((nang ma) OR (tang ma)) hoi. hieu ve nam thuc va danh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (co sach)) y ((nang ma) OR (tang ma)) hoi. hieu ve nam thuc va danh lai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (co sach)) y ((nang ma) OR (tang ma)) hoi. hieu ve nam thuc va danh lai cua triet*".