Perhaps you should try some spelling variations:
doanh hoan » doanh doanh, doanh khoa, doanh nhan
hang khoa » dung khoa
luan tieu » luan thiet
tieu than » tieu nhan, tieu tham, tieu chuan
ban hang » ngan hang
luan ket » lien ket
ket luan » ket qua, te luan, dat luan
thien » thieu, tien, hien

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 than (kinh OR minh) doanh hoan thien~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ban hang khoa luan ket luan tieu than (kinh OR minh) doanh hoan thien".
• Adding a wildcard symbol may retrieve word variants: ban hang khoa luan ket luan tieu than (kinh OR minh) doanh hoan thien*.