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