Perhaps you should try some spelling variations:
doanh luan » doanh nhan
thieu xanh » chieu xanh, thien anh, thien danh
hieu manh » chieu xanh, hieu nganh, dieu hanh
luan tang » luan nang, lan tang, xuan trang
tang cong » tang cuong, trang cong, dang cong
dan toan » van toan, dan than, manh toan
ban than » ban thanh, van thanh, ban hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) OR (hieu manh)) - toan doanh luan tang cong ((dan toan) or (ban than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - toan doanh luan tang cong ((dan toan) OR (ban than)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - toan doanh luan tang cong ((dan toan) or (ban than)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - toan doanh luan tang cong ((dan toan) or (ban than)) cau*.