Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
te sach » toc sach
hieu ve » hieu va, hieu van
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc manh
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
anh va » hanh va
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: te sach y nang x hoi. hieu ve cam ((luc van) OR (duc van)) ((hanh vi) OR (anh va)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang x hoi. hieu ve cam ((luc van) OR (duc van)) ((hanh vi) or (anh va)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. hieu ve cam ((luc van) OR (duc van)) ((hanh vi) or (anh va)) cua triet*.