Perhaps you should try some spelling variations:
ban thanh » ban hanh
hieu van » hieu va, thien van, lieu va
dau quoc » dan quoc, dau nuoc, da quoc
ban hang » ngan hang
ve triet » va trien, su triet
nang xa » nang x, lang xa, nang ma
van dau » van dao, phan dau
tu sac » tu sach, tu san, tu bac
hai ve » hoai ve, hai va, hai vu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) OR (tu cac)) ky nang xa hoi. hieu van dau quoc ((ban thanh) or (ban hang)) hai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu cac)) ky nang xa hoi. hieu van dau quoc ((ban thanh) OR (ban hang)) hai ve triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu cac)) ky nang xa hoi. hieu van dau quoc ((ban thanh) or (ban hang)) hai ve triet*".