Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
mang tuong » manh tuong, mang thong, mang trong
tranh cua » doanh cua, manh cua
cua mang » cua dang, cua hang, cua manh
tap toan » tap quan, bai toan
tap doan » tap quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu xanh) or (chieu sang)) - canh tranh cua mang tuong ((tap toan) OR (tap doan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu sang)) - canh tranh cua mang tuong ((tap toan) OR (tap doan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chieu sang)) - canh tranh cua mang tuong ((tap toan) OR (tap doan)) cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu sang)) - canh tranh cua mang tuong ((tap toan) OR (tap doan)) cau*.