Dual VGA monitors (not mirrored) with Mac mini 2012
Well, the Mac mini should include both an HDMI connector, as well as a Thunderbolt connector.   

If you are actually using VGA monitors with VGA connectors, you would simply need one HDMI -> VGA adaptor for one monitor, and one Thunderbolt -> VGA adaptor for the other.  

If your monitors are newer, you might like out and one will already have an HDMI connector, so no adaptor is needed.

But the simple answer to your question is YES, you just need to buy the appropriate adaptors for the connections you have.