Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
van hau » van ha, van hai, van dau
hau xuc » chat xuc
va vanh » va danh, va hanh, va anh
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang

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 ((y nang) OR (v nang)) xa hoi. hieu van hau xuc ((va vanh) OR (va van)) dai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) or (v nang)) xa hoi. hieu van hau xuc ((va vanh) OR (va van)) dai cua triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (v nang)) xa hoi. hieu van hau xuc ((va vanh) OR (va van)) dai cua triet*.