how to retrieve deleted files

How to retrieve deleted files from clean recyled bin, actually, i laplink the two pc’s, i transfer the folder mydocument (w/ subfolder), when i open the copied files i noticed that the three folder under the mydocument missing & the source files also missing, i search this in find files/folders & its also missing. its unbelievable. but’ its true. i don’t know whats going on, can u help me finding the solution for this or give me software to retrieve this file.
Thank you
Ricky