Perhaps you should try some spelling variations:
doanh thanh » danh thanh, doanh nhan, dinh thanh
doanh doanh » toan doanh, doanh hoan, dong doanh
hang khoa » dung khoa
luan tieu » luan thiet
ban hang » ngan hang
luan ket » lien ket
ket luan » ket qua, te luan, dat luan
tieu chi » hieu chi, trien chi, dieu chim

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

• Performing a fuzzy search may retrieve terms with similar spellings: ban hang khoa luan ket luan tieu chi minh ((doanh doanh) OR (doanh thanh)) hieu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ban hang khoa luan ket luan tieu chi minh ((doanh doanh) OR (doanh thanh)) hieu".
• Adding a wildcard symbol may retrieve word variants: ban hang khoa luan ket luan tieu chi minh ((doanh doanh) OR (doanh thanh)) hieu*.