Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
nam truc » nam truoc, nam thuc, nam trung
hanh dai » hanh tai, hanh dao, vanh dai
su sach » so sach, vu sach
sach va » sach xa, sach ha, sach dao
va lang » va nang, hoa lang
lang xa » lang ha, dang xay, lang van
va hanh » van hanh, va thanh, va danh

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach va lang xa hoi. hieu van ((cau truc) or (nam truc)) va hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach va lang xa hoi. hieu van ((cau truc) OR (nam truc)) va hanh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach va lang xa hoi. hieu van ((cau truc) or (nam truc)) va hanh dai cua triet*.