If you have access to a VM that can open the VMDK file, you can attach it to it and view the volumes of the new disk in the explorer as if you connected it to a sata docking station for instance.
If you only have the VMDK handy, you can open it in 7-Zip in which you will find a file for each partition that you can open to see their contents. You can also mount the VMDK in Linux using DiskInternals.