Welcome to the Community,
It depends on the age/size of the snapshot (Ubuntu-000001... files). The Ubuntu-f00x.vmdk files represent the base disk, which - in case the files are not logically corrupted - seems to be complete. If the data in the snapshot is important, it might be worth a try to create dummies for the missing .vmdk files and chain the snapshot to the base disk to see which files can be rescued.
André