3 Monitor Setup HELP!

Hello! I desperately need your help! I have been looking into making my single monitor set up into a 3 monitor set up by buying two more of my current monitor (Asus VS238H-P). I have an MSI GTX 970 and I am really confused about how to make the cabling work. The monitors only have 1 HDMI, 1 DVI and 1 VGA. What do I need in order to run all three monitors in Surround in terms of cables and adapters? I have been reading about how I need to have one of them running a Displayport cable - but my monitors dont have that option? Thanks