My mistake as you not wanting to see the hinges but flush hinges would work best as they have a very small knuckle! The problem you have is that they are egg cup construction so any decent concealed hinge would require you fixing in the back which may miss the guts of the edge of the door. And...
I understand the doors your talking about it's what we call 'egg cup' but they do have an edge on them so you could fit flush hinges which requires no pairing out, I will try and send a link...