Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh di » thanh doi, thanh de, thanh do
su triet » su viet, 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
di su » doi su, ki su, da su

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~.
• 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.
• 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*.