Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach cam » sach cap, mach cam, sach tham
nam thuc » nam thuoc, am thuc, nam thu
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
danh vi » hanh vi, danh di, danh va
dinh vi » dinh ve, dinh viet, dinh tri
ve nam » he nam, va nam, le nam
x hoi » xa hoi, o hoi, x ho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach cam nang x hoi. hieu ve nam thuc vat ((danh vi) OR (dinh vi)) cua triet~.
• Adding a wildcard symbol may retrieve word variants: su sach cam nang x hoi. hieu ve nam thuc vat ((danh vi) or (dinh vi)) cua triet*.