Perhaps you should try some spelling variations:
doanh hoan » doanh doanh, doanh khoa, doanh nhan
hang khoa » dung khoa
trien tri » trien thi, tien tri, trieu thi
ban hang » ngan hang
dat luan » dan luan, dat quang, bai luan
dau luan » dan luan, khau luan, dau quang
kinh » dinh, minh
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 ((dat luan) OR (dau luan)) trien tri kinh doanh hoan thien~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ban hang khoa luan ((dat luan) OR (dau luan)) trien tri kinh doanh hoan thien".
• Adding a wildcard symbol may retrieve word variants: ban hang khoa luan ((dat luan) OR (dau luan)) trien tri kinh doanh hoan thien*.