Yes, here is how you can delete specific test run results:
1) Open Run Results Viewer (there should be a shortcut on your Desktop on a machine that has UFT and/or the UFT for ALM Plugin installed).
2) If you are wanting to delete run results stored in ALM, in Run Results Viewer, go to Tools > ALM Connection > connect to your ALM/QC server.
3) Once your ALM/QC connection is established in Run Results Viewer, go to Tools > Run Results Delection Tool.
4) In the Run Results Deletion Tool, click the Browse button to open either local or ALM/QC-stored tests. You may then select and delete whichever test run results you see fit.
5) Additional details may be found in the Run Results Viewer User Guide (UFT/RRV Help > Run Results Viewer User Guide).