The above scenario puts forth two possibilities:
The deleted files have been overwritten
The files have been recovered and renamed
If the deleted files are overwritten by new files, they cannot be recovered. In case the files have been renamed, you can use 'Find Now' option to search for these files according to their file signatures. Further, the 'File Type List' and 'Filtered Tree' options, available immediately after scanning, allow you to browse files based on their types and preview them in the preview pane. You can easily find your deleted files using any of these methods.