Perhaps you should try some spelling variations:
ban thanh » ban hang
hieu van » hieu va, thien van, lieu va
ban hanh » ban hang
thai cua » than cua, tai cuc, tri cua
nang xa » nang x, lang xa, nang ma
van lam » van nam
lam tuc » lam thuoc, lam truoc, luat tuc
vai cua » dai cua, hai cua, lai cua
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky nang xa hoi. hieu van lam tuc ((ban thanh) OR (ban hanh)) ((vai cua) or (thai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang xa hoi. hieu van lam tuc ((ban thanh) OR (ban hanh)) ((vai cua) OR (thai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang xa hoi. hieu van lam tuc ((ban thanh) OR (ban hanh)) ((vai cua) or (thai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang xa hoi. hieu van lam tuc ((ban thanh) OR (ban hanh)) ((vai cua) or (thai cua)) tre*.