Perhaps you should try some spelling variations:
doanh hien » doanh chien, doanh hieu, doanh tien
dat quang » dau quang, chat quang, dang quang
hang khoa » dung khoa
don doanh » dong doanh, von doanh, doi doanh
ban hang » ngan hang
dat luan » dan luan, dau luan, bai luan
tieu thu » trieu thi, tieu su
thu minh » thi minh, chi minh, vu minh
minh don » minh doan, minh dong, minh son

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 ((dat luan) OR (dat quang)) tieu thu minh don doanh hien~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ban hang khoa luan ((dat luan) OR (dat quang)) tieu thu minh don doanh hien".
• Adding a wildcard symbol may retrieve word variants: ban hang khoa luan ((dat luan) OR (dat quang)) tieu thu minh don doanh hien*.