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