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