Perhaps you should try some spelling variations:
ban hanh » ban hang
chat huu » pham huu
dai hoa » dai khoa, dai hoc, dai hoi
hieu va » lieu va, hieu qua
lai hoi » dai hoi, lai hoa, mai hoi
lai roi » loi roi
huu ban » huu bang, huu han, cuu ban
va chat » van chat, va phat, cao chat
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
cua te » cua tu

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 nang ((((lai hoi) OR (lai roi))) or (dai hoa)). hieu va chat huu ban hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((((lai hoi) OR (lai roi))) OR (dai hoa)). hieu va chat huu ban hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((((lai hoi) OR (lai roi))) or (dai hoa)). hieu va chat huu ban hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((((lai hoi) OR (lai roi))) or (dai hoa)). hieu va chat huu ban hanh vi cua te*.