Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
so sach » so sanh, bo sach, co sach
va dinh » van dinh, va kinh, va tinh
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
va tai » va tac, va tap
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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: so sach v nang x hoi. lieu va tai trung ((van hanh) OR (va dinh)) vi cua triet~.
• Adding a wildcard symbol may retrieve word variants: so sach v nang x hoi. lieu va tai trung ((van hanh) or (va dinh)) vi cua triet*.