Pictures Question:developed a roll w/blurry photos :-(

My mom took pics with her camera and a few came out blurry. You can see our face shapes bodies but no nose, eyes and so forth. Is there any way I can get the pics to come out clearer? I have PhotoShop at work I play with but I am not an expert. Also, can I take the negatives somewhere and see if they can do something with those pics to clear them up? Or possibly just the pic itself so they can scan and touch them up for me? Thank You.