Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, hieu manh
chieu tinh » trieu tinh, lieu tinh, chau tinh
cua phuong » cuu phuong, cuc phuong, luan phuong
cua thong » cua thuong, cua khong, cua tong
tap quang » tap quan, tac quang, tai quang
cong tap » cuong tap, cong tac, cong tan

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

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