Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam trung » nam trong, tai trung, ba trung
van hanh » van thanh, ban hanh, van anh
va hanh » va thanh, va danh, ban hanh
su sach » so sach, vu sach
vu nang » vuc nang, va nang, vu dang
hieu va » lieu va, hieu qua
va nam » van nam, ha nam, va nay
v nang » va nang, van nang, voi nang
vi cua » vai cua, di cua

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