Perhaps you should try some spelling variations:
ban hanh » ban hang
lai hoi » lai hoa, lai roi, mai hoi
dai hoi » dai hoc, dai hai, dai moi
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cham so » cham soc, cham o, ham so
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
so ban » sao ban, so bang, co ban
vi cua » vai cua, di cua
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 (dai hoi)). hieu ve cham so 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 (dai hoi)). hieu ve cham so ban hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((lai hoi) or (dai hoi)). hieu ve cham so ban hanh vi cua te*.