If you have already tried fixing CD/DVD scratches without any success or partial success, and are still unable to copy important files and folders from damaged media, try Unstoppable Copier - the small and portable Windows utility lets you recover maximum possible data from media having bad sectors, scratches or any other reason giving errors while reading data.
The program tries to read all possible data smartly skipping unreadable sectors, Using this method most types of files can be made usable even if some parts were not recoverable in the end.