Read this blog post to know how to repair VHD file manually:

Repair VHD File Manually – Utmost Solutions for VHD Recovery | N. Sem's Blog

Or you can also try a professional solution to recover data from corrupt VHD files. Download free demo version of VHD Recovery software, and check the preview of your recovered files and folders in tree-structure. I hope the shared information would be helpful here.

Thanks and best regards.