Perhaps you should try some spelling variations:
ban hanh » ban hang
mai khoi » mai khoa, tai khoa, cac khoi
chat xuc » chat huu, cam xuc, chao xu
hieu van » hieu va, thien van, lieu va
mai hoi » dai hoi, lai hoi, mai doi
hieu ve » hieu va
xuc ban » duc ban, cuc ban, quoc ban
tu can » tu ban, tu cac, thu canh
vi cua » vai cua, di cua
cua te » cua tu
can ky » van ky, dan ky, ban ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu can ky nang ((mai hoi) or (mai khoi)). ((hieu ve) OR (hieu van)) chat xuc ban hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky nang ((mai hoi) OR (mai khoi)). ((hieu ve) OR (hieu van)) chat xuc ban hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu can ky nang ((mai hoi) or (mai khoi)). ((hieu ve) OR (hieu van)) chat xuc ban hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu can ky nang ((mai hoi) or (mai khoi)). ((hieu ve) OR (hieu van)) chat xuc ban hanh vi cua te*.