Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
luoc can » luc canh, hoc can, luoc dai
luoc van » luoc va, luc van, luot van
hanh de » hanh ve, hanh kem
te sach » toc sach
vu nang » vuc nang, va nang, vu dang
v nang » va nang, van nang, voi nang
de cua » le cua, te cua, dieu cua
van ha » van hoa, van chat, van hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((v nang) or (vu nang)) xa hoi. hieu van ha ((luoc van) OR (luoc can)) hanh de cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((v nang) OR (vu nang)) xa hoi. hieu van ha ((luoc van) OR (luoc can)) hanh de cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((v nang) or (vu nang)) xa hoi. hieu van ha ((luoc van) OR (luoc can)) hanh de cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((v nang) or (vu nang)) xa hoi. hieu van ha ((luoc van) OR (luoc can)) hanh de cua triet*.