Perhaps you should try some spelling variations:
doanh hoan » doanh doanh, doanh khoa, doanh nhan
hang khoa » dung khoa
ban hang » ngan hang
luan dat » luat dat, luan dac, luan day
dat luan » dan luan, dau luan, dat quang
thi minh » chi minh, thi bich
thi hanh » thi thanh
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 thiet ((thi minh) or (thi hanh)) doanh hoan thien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ban hang khoa luan dat luan thiet ((thi minh) OR (thi hanh)) doanh hoan thien.
• Adding a wildcard symbol may retrieve word variants: ban hang khoa luan dat luan thiet ((thi minh) or (thi hanh)) doanh hoan thien*.