Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
thieu xanh » chieu xanh, thien anh, thien danh
hieu manh » chieu xanh, hieu nganh, dieu hanh
trinh chu » trinh cau, trinh cho, trinh thuc
bang cong » dang cong, bang song, hang cong
chu bang » thu bang, chuc nang, chu quang
tan toan » tan tran, van toan, dan toan
tap toan » tap doan, tap quan, bai toan

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)) - canh trinh chu bang cong ((tan toan) OR (tap toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - canh trinh chu bang cong ((tan toan) OR (tap toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (hieu manh)) - canh trinh chu bang cong ((tan toan) OR (tap toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (hieu manh)) - canh trinh chu bang cong ((tan toan) OR (tap toan)) cau*.