Need to block a subpage from showing up in Google Search

Hi, new and learning, so here goes. I have created a site on www.ads-software.com. The site is supported on a shared server, and there are pages that show up in google search under the server name (not the domain name), though the pages state ‘Page Not Found’. I understand that these pages will eventually be dropped from being indexed by Google, but I would prefer to proactively block them, if possible. Problem is these subpages (below) are not listed in the WordPress dashboard ‘Pages’ tab, so I can neither remove them there or add a robot.txt to the code.

/2012/07/03/hello-world
/2012/01/07/hello-world-2-3/
/2011/07/30/dolor-and-the-sit-amet/

Any suggestions? Or can I add the ‘Disallow’ coding if I can’t add to the exact page?

Help please. Thanks!