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