A VGA splitter would let you output the same thing on two displays, if that is what you want to do, you can do that.
If you want to use two displays with different content (an extended desktop), you will need to find a way to physically plug in both the HDMI and the VGA; however they may not be able to function at the same time (and so they designed them close together to make it impossible connect).
Hello thanks for your reply. The Usb video adapter seems to be a solution, however i am not sure if it could work in a 2nd external monitor. What i need is to have 2 extended monitors in order to have more desktop and display space
I have never used one of these adapters, but I would expect it to work along side your existing ports to allow two external monitors. The newegg reviews seem to reaffirm that it would let you use your laptop ports and this thing at the same time.
Alternatively you could see if your model offers a docking station with more spacing between the ports (you should probably contact sony before going this route to ensure it can output to two seperate external monitors).