Removing this content from Google's search first begins with removing the content from your NetCommunity site. If the content has been removed, and still shows up in a google search, this indicates the content (snapshot of the page) has been cached

Once this is complete follow the following Google Support Article 

If content was deleted from a site but still shows up in Google search results, the page description or cache might be outdated. To request a removal of outdated content:

  1. Go to the Remove outdated content page.
  2. Enter the URL (web address) of the page that has the outdated content you want to remove.
  3. Select Request removal.
    • If you see the message "We think the image or web page you're trying to remove hasn't been removed by the site owner," follow the onscreen steps to give us more information.
    • If you see the message "This content is gone," select Request removal.

You can check the status of your request on the Remove outdated content page.

 Please contact Google or an IT professional for assistance with implementing Google Webmaster tools as it is beyond Blackbaud's scope of support.