Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
sach ly » sach y, sach lo, sach ty
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ly nang » ky nang, ly hang, ly vang
ban bo » can bo, ban do, ben bo
ban co » ban do, san co
x hoi » xa hoi, o hoi, x ho

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 ly nang x hoi. hieu ve ((ban bo) OR (ban co)) van hanh vi ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang x hoi. hieu ve ((ban bo) OR (ban co)) van hanh vi ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly nang x hoi. hieu ve ((ban bo) OR (ban co)) van hanh vi ((cua triet) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang x hoi. hieu ve ((ban bo) OR (ban co)) van hanh vi ((cua triet) or (su triet))*.