Perhaps you should try some spelling variations:
ban hanh » ban hang
chat xuc » chat huu, cam xuc, chao xu
hieu va » lieu va, hieu qua
xuc ban » duc ban, cuc ban, quoc ban
mai hoi » mai khoi, lai hoi, mai doi
va chat » van chat, va phat, cao chat
dai hoi » dai hoc, dai hai, dai moi
vi cua » vai cua, di cua
cua te » cua tu
sac ky » cac 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 ((sac ky) OR (sai ky)) dang ((mai hoi) or (dai hoi)). hieu va chat xuc ban hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sai ky)) dang ((mai hoi) OR (dai hoi)). hieu va chat xuc ban hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) OR (sai ky)) dang ((mai hoi) or (dai hoi)). hieu va chat xuc ban hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) OR (sai ky)) dang ((mai hoi) or (dai hoi)). hieu va chat xuc ban hanh vi cua te*.