Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van dinh » van minh, van dich, va dinh
truc van » truc va, thuc van, truc ban
hieu va » lieu va, hieu qua
dinh vi » dinh ve, dinh viet, dinh tri
hieu ve » hieu van
vi cua » vai cua, di cua
su sai » su tai, su hai, su mai
su dai » sau dai, si dai, su tai
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: ((su sai) OR (su dai)) ky nang x hoi. ((hieu ve) OR (hieu va)) cau truc van dinh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sai) OR (su dai)) ky nang x hoi. ((hieu ve) or (hieu va)) cau truc van dinh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((su sai) OR (su dai)) ky nang x hoi. ((hieu ve) or (hieu va)) cau truc van dinh vi cua triet*.