Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh soc » thanh son, nhanh soc, thanh hoc
su triet » su viet, ve triet
hanh doi » thanh doi, hanh noi, hang doi
van hanh » ban hanh, van anh, van ban
hieu van » hieu va, thien van, lieu va
soc van » hoc van, oc van, sac van
te sach » toc sach
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
su tien » su kien, su hien, tu tieng

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y ((nang xa) or (lang xa)) hoi. hieu van thanh soc van hanh doi ((su triet) OR (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (lang xa)) hoi. hieu van thanh soc van hanh doi ((su triet) OR (su tien))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang xa) or (lang xa)) hoi. hieu van thanh soc van hanh doi ((su triet) OR (su tien))*".