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
bo sach » hoc sach
co sach » cuon sach, hoc sach
cac doi » cac dai, cac toi, cau doi
doi van » do van, doi va, doi ban
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: ((bo sach) or (co sach)) ky nang x ho. lieu va cac doi van thanh di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((bo sach) OR (co sach)) ky nang x ho. lieu va cac doi van thanh di su triet.
• Adding a wildcard symbol may retrieve word variants: ((bo sach) or (co sach)) ky nang x ho. lieu va cac doi van thanh di su triet*.