Hi Katin,
If you ask the way to get lost data back then I would simply say yes we can recover the lost data but when question came how much of the data would I get back? Here comes certain conditions that Mr.Quad5Ny nicely explained above, so point is, it is all depend upon the usage of drive if you or that "thief" did not perform much read/write operations after deleting the photos or files then upto 100% data recovery is possible by using "Stellar Phoenix Data Recovery" otherwise it will provide you the rest photos or data that left untouched.
Hope this help you!!