Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
thanh di » thanh doi, thanh de, thanh do
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
bao duc » dao duc, bao luc, cao duc
te sach » toc sach
so sach » so sanh, bo sach, co sach
van bao » van ban, van dao
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) OR (so sach)) ky nang x hoi. hieu van bao duc va thanh di ((cua triet) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (so sach)) ky nang x hoi. hieu van bao duc va thanh di ((cua triet) OR (su triet))~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (so sach)) ky nang x hoi. hieu van bao duc va thanh di ((cua triet) OR (su triet))*.