To find images that are available under a Creative Commons Share-Alike License, go to:
(Google Advanced Search.Google.Google.2020. Web.30 Aug 2010.)
Also try
In the Sponsor Banner at the top of the page, unclick "use for commercial purposes."
Be sure that you read and understand that Creative Commons search can not guarantee that all links will be covered under CC Share-Alike licenses. It is up to the user to confirm the license and usage rights.