Perhaps you should try some spelling variations:
ban hanh » ban hang
doi cua » dai cua, hoi cua, dong cua
xuc ban » duc ban, cuc ban, quoc ban
va tham » van tham, va thanh, va thuat
va cham » va chat
cao hoi » cau hoi, co hoi, cao hoc
sac ky » cac ky, sai ky
di cua » dai cua, de cua, do cua
tu sac » tu sach, tu cac, tu san

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang cao hoi. hieu ((va cham) OR (va tham)) xuc ban hanh ((di cua) OR (doi cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang cao hoi. hieu ((va cham) OR (va tham)) xuc ban hanh ((di cua) or (doi cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang cao hoi. hieu ((va cham) OR (va tham)) xuc ban hanh ((di cua) or (doi cua)) tre*.