Recover corrupted pdf

the partition of my pc was misordered due to a problem, after recovery, some of my pdf files are corrupted. i used “advanced pdf repair” but it said pdf is damaged. how can i recover my pdf files ? they are important.
Answer #1
etis replied: how can i recover my pdf files ? they are important.
Obviously you can’t!
etis replied: i used "advanced pdf repair" but it said pdf is damaged