Will a non-contact voltage detector find live wires in concrete walls?
Almost definitely no. 

I'm not familiar with that exact model, but typically non-contact voltage detectors are designed to have to be within a few mm of the wire to work.  They're called "non-contact", but that means no electrical contact (i.e. they don't have to touch the bare wire). You'll just about have to touch the tool to the insulation of a wire for them to work properly, so it's not likely you'll be detecting wiring within any type of wall with one of these tools.

The description from the Fluke website for the Fluke 1AC II A1 VoltAlertTM Electrical Tester, seems to agree.


  The next generation VoltAlert™ AC non-contact voltage testers from Fluke are easy to use – just touch the tip to a terminal strip, outlet, or supply cord...


Notice that it says, "just touch the tip to...".