Perhaps you should try some spelling variations:
ban hang » ngan hang
dang mai » dang hai, dang mau, dang bai
chat xuc » chat huu, cam xuc, chao xu
hieu va » lieu va, hieu qua
ky dang » ky nang, ky danh
mai hoi » mai khoi, dai hoi, lai hoi
va chat » van chat, va phat, cao chat
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu bac
tu san » thu san, tu ban, tu can
cua tu » cua tuc, cua su, cua cu

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