Perhaps you should try some spelling variations:
doanh hoan » doanh doanh, doanh khoa, doanh nhan
hang khoa » dung khoa
trieu tri » trien tri, dieu tri, trien thi
ban hang » ngan hang
ket luan » ket qua, te luan, ket doan
dat luan » dan luan, dau luan, dat quang
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) OR (dat luan)) ((trieu tri) or (trieu thi)) kinh doanh hoan thien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ban hang khoa luan ((ket luan) OR (dat luan)) ((trieu tri) OR (trieu thi)) kinh doanh hoan thien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ban hang khoa luan ((ket luan) OR (dat luan)) ((trieu tri) or (trieu thi)) kinh doanh hoan thien".
• Adding a wildcard symbol may retrieve word variants: ban hang khoa luan ((ket luan) OR (dat luan)) ((trieu tri) or (trieu thi)) kinh doanh hoan thien*.