It is now easy to restrict your Google Image Search results to find images which have been tagged with a specific license. This enables the user to find content from across the web that you can be shared, used, and even modified. Searches are also capable of returning content under other licenses, such as the GNU Free Documentation License, or images that are in the public domain.
How to search for a CC licensed image in Google
The best was to search for a CC licensed image in Google is by navigating to the Google home page www.google.com. Enter your search option and click on IMAGES option from the top menu and then click on TOOLS.
In the TOOLS menu, you will an option to choose USER RIGHTS
Google can only provide search results that its algorithms find tagged with the license you specify; it is your obligation to verify the license of the image you’re using and make sure you’re conforming to its guidelines.