Just a suggestion, you may delete forever the files in the trash that you had been deleted in the specific folder, that way you may not found the files again.
Thank you!
As you said you deleted the files from the folder so it may possible you not able to find. Still you can search the file with this activity. One alternative solution is if you ever store those file on local drive then try some free utility program like recuva, stellar data recovery free edition, tesdisk etc. These programs able to retrieve the lost data, deleted data, formatted data easily. Probably it may help you.