Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dieu cua » dieu tra
hieu van » hieu va, thien van, lieu va
va danh » va dinh, va hanh, dia danh
cau luc » cau truc, cau phuc
tu sach » thu sach, su sach, te sach
va nang » van nang, da nang, cam nang
van cau » van dau, van hau, van chat
va dan » ca dan, va dao, va dau
v nang » vu nang, van nang, voi 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: tu sach ((v nang) OR (va nang)) xa hoi. hieu van cau luc ((va danh) OR (va dan)) dieu cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((v nang) or (va nang)) xa hoi. hieu van cau luc ((va danh) OR (va dan)) dieu cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((v nang) or (va nang)) xa hoi. hieu van cau luc ((va danh) OR (va dan)) dieu cua triet*.