Perhaps you should try some spelling variations:
ban hanh » ban hang
cham dua » chay dua, cham giua, pham duc
dua ban » dia ban, cua ban, qua ban
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu van
hieu va » lieu va, hieu qua
tu van » tu va
vi cua » vai cua, di cua
cua te » cua tu
ma hoi » xa hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu van ky nang ((ma hoi) or (mai hoi)). ((hieu ve) or (hieu va)) cham dua ban hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu van ky nang ((ma hoi) OR (mai hoi)). ((hieu ve) OR (hieu va)) cham dua ban hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: tu van ky nang ((ma hoi) or (mai hoi)). ((hieu ve) or (hieu va)) cham dua ban hanh vi cua te*.