Perhaps you should try some spelling variations:
thanh tranh » thanh thanh, thanh tran, thanh trang
chieu sang » chieu sach, chieu xanh, hieu lang
tranh luan » trinh luan, trinh luat, doanh luan
chong cong » cong cong, thong cong, cuong cong
doi chieu » doc hieu, doi chi, ho chieu
van toan » van tan, van thanh, manh toan
van tuan » van quan, van ban, anh tuan

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 - thanh tranh luan ((chong cong) or (trong cong)) ((van toan) or (van tuan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh tranh luan ((chong cong) OR (trong cong)) ((van toan) OR (van tuan)) cao.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh tranh luan ((chong cong) or (trong cong)) ((van toan) or (van tuan)) cao*.