Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
cua triet » cua viet, su triet, va triet
nang van » dang van, tang van, lang van
hieu van » thien van, lieu va, hieu ve
van hoe » van hoa, van hoc, van hieu
hieu va » lieu va, hieu qua
van cua » vang cua, ban cua, dan cua
su cac » tu cac, su cao, su can
loc va » hoc va
luc va » duc va, tuc va

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 cac ky nang van hoe. ((hieu van) OR (hieu va)) cac ((loc va) OR (luc va)) thanh van cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cac ky nang van hoe. ((hieu van) or (hieu va)) cac ((loc va) OR (luc va)) thanh van cua triet~".
• Adding a wildcard symbol may retrieve word variants: su cac ky nang van hoe. ((hieu van) or (hieu va)) cac ((loc va) OR (luc va)) thanh van cua triet*.