Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
ve bac » ve cac, ve ban, va bac
ve bao » te bao, va bao
so van » su van, vo van
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: tu sach ty nang x hoi. hieu ((((ve bac) OR (he bac))) OR (ve bao)) so van hanh vi cua triet~.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu ((((ve bac) or (he bac))) or (ve bao)) so van hanh vi cua triet*.