Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
ban so » ban do, ban co, ban su
ban bo » can bo, ban do, ban co
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang x ho. hieu ve ((ban so) OR (ban bo)) van hanh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x ho. hieu ve ((ban so) OR (ban bo)) van hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x ho. hieu ve ((ban so) OR (ban bo)) van hanh vi cua triet*.