Perhaps you should try some spelling variations:
thanh tien » thanh vien, thanh nien, thang tien
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
nam tuc » nam thuc, nam truc, nam tu
tien su » thien su, tieu su, nien su
tu bac » tu ban, tu cac, tu bat
tu san » thu san, tu ban, tu can
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu bac) or (tu san)) ky nang xa hoi. hieu van nam tuc va thanh tien su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu bac) OR (tu san)) ky nang xa hoi. hieu van nam tuc va thanh tien su triet.
• Adding a wildcard symbol may retrieve word variants: ((tu bac) or (tu san)) ky nang xa hoi. hieu van nam tuc va thanh tien su triet*.