Perhaps you should try some spelling variations:
doanh tieng » doanh tien, anh tieng, hanh tieng
doanh doanh » toan doanh, doanh hoan, doanh thanh
hang khoa » dung khoa
tieu nhan » tiep nhan, tieu chuan, trien nhan
nhan kinh » than kinh, nha kinh, nhan sinh
ban hang » ngan hang
ket luan » te luan, dat luan, ket doan

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

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