Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cua triet » cua viet, su triet, va triet
cac thoi » cac hop, cac tro, cac thu
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
thanh d » thanh de, thanh do, thanh _
d cua » de cua, do cua, da cua

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) OR (cac thoi)) van thanh d cua 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) OR (cac thoi)) van thanh d cua triet.
• 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) OR (cac thoi)) van thanh d cua triet".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (co sach)) ky nang x ho. lieu va ((cac toi) OR (cac thoi)) van thanh d cua triet*.