Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cua triet » su triet, va triet
thanh soc » thanh son, nhanh soc, thanh hoc
hieu van » hieu va, thien van, lieu va
van hanh » ban hanh, van anh, van ban
cua viet » ca viet, hoa viet, cua vat
lang xa » lang ha, dang xay, lang van
soc van » hoc van, oc van, sac van
hanh di » hanh vi, hanh de, hang di
nang xa » nang x, nang ma, mang xa
te sach » toc sach

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 di ((cua triet) OR (cua viet))~.
• 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 di ((cua triet) OR (cua viet))*.
• 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 di ((cua triet) OR (cua viet))*".