Perhaps you should try some spelling variations:
ban hanh » ban hang
mai hoi » mai khoi, dai hoi, lai hoi
dua ban » dia ban, cua ban, qua ban
ve chay » ve chat, de chay, ve cham
hieu ve » hieu va, hieu van
vi cua » vai cua, di cua
cua te » cua tu
sac ky » cac ky
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 ((sac ky) OR (sai ky)) nang ((ma hoi) or (mai hoi)). hieu ve chay dua ban hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sai ky)) nang ((ma hoi) OR (mai hoi)). hieu ve chay dua ban hanh vi cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) OR (sai ky)) nang ((ma hoi) or (mai hoi)). hieu ve chay dua ban hanh vi cua te*".