Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
dung van » duong van, dung va, dang van
cac dung » cach dung, cac duong, tac dung
van cac » van hac, van cau, van bac
nang xa » nang x, lang xa, nang ma
hai ky » thai ky, hoi ky, sai ky
hai ly » dai ly

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((hai ky) OR (hai ly)) nang xa hoi. hieu van cac dung van hanh vi ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((hai ky) OR (hai ly)) nang xa hoi. hieu van cac dung van hanh vi ((cua triet) OR (su triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((hai ky) OR (hai ly)) nang xa hoi. hieu van cac dung van hanh vi ((cua triet) or (su triet))*".