Perhaps you should try some spelling variations:
ban hang » ngan hang
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
xuc ban » duc ban, cuc ban, quoc ban
doi cau » doi dau, doi ca, doi cay
di cau » da cau, diem cau
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang x hoi. ((hieu ve) or (hieu qua)) cam xuc ban hang ((doi cau) OR (di cau)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x hoi. ((hieu ve) OR (hieu qua)) cam xuc ban hang ((doi cau) OR (di cau)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x hoi. ((hieu ve) or (hieu qua)) cam xuc ban hang ((doi cau) OR (di cau)) tren".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. ((hieu ve) or (hieu qua)) cam xuc ban hang ((doi cau) OR (di cau)) tren*.