Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
thuc van » thuc vat, thuc dan, thuc va
hanh moi » thanh moi, hanh noi, hanh mot
van hanh » van thanh, ban hanh, van anh
nam thuc » nam thuoc, am thuc, nam thu
hieu ve » hieu va, hieu van
long ha » dong ha, cong ha, dong hoa
nang ma » tang ma, sang ma, nang cao
tu sach » thu sach, su sach, te 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: tu sach y ((nang ma) or (long ha)) hoi. hieu ve nam thuc van hanh moi ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang ma) OR (long ha)) hoi. hieu ve nam thuc van hanh moi ((cua triet) OR (su triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang ma) or (long ha)) hoi. hieu ve nam thuc van hanh moi ((cua triet) OR (su triet))*".