Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
chieu tinh » trieu tinh, lieu tinh, chau tinh
cua thuong » cua truong, cua phuong, ca thuong
cua thong » cua khong, cua tong, suat thong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan tap

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

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