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

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) OR (nam thuc)) 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) OR (nam thuc)) va thanh tien su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu bac) or (tu san)) ky nang xa hoi. hieu van ((nam tuc) OR (nam thuc)) 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) OR (nam thuc)) va thanh tien su triet*.