Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hang cong » dang cong, hang nong, thanh cong
bang cong » dang cong, bang song, dung cong
toan phan » thanh phan, toan ban, hoa phan
tranh va » tranh van, trang va, trinh va
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((dieu hanh) or (chieu xanh)) - canh tranh va ((hang cong) OR (bang cong)) toan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dieu hanh) OR (chieu xanh)) - canh tranh va ((hang cong) OR (bang cong)) toan phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((dieu hanh) or (chieu xanh)) - canh tranh va ((hang cong) OR (bang cong)) toan phan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((dieu hanh) or (chieu xanh)) - canh tranh va ((hang cong) OR (bang cong)) toan phan cau*.