Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh di » thanh doi, thanh de, thanh do
su triet » su tien, ve triet
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
cac toi » cac thoi
toi van » thi van, tri van, doi van
su viet » so viet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (co sach)) ky nang x ho. lieu va cac toi van thanh di ((su triet) OR (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (co sach)) ky nang x ho. lieu va cac toi van thanh di ((su triet) OR (su viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (co sach)) ky nang x ho. lieu va cac toi van thanh di ((su triet) OR (su viet))".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (co sach)) ky nang x ho. lieu va cac toi van thanh di ((su triet) OR (su viet))*.