Simply search an 'image' you want:
Click on the 'Cog Wheel' next to safe search :
Next click on 'advanced search' :
Your screen should look like this:
Scroll down- You should see the word 'not filtered by licence' click on it and click on 'free to use or share' when you click on it , it should look like this:
Last , click on 'advanced search' for your results:
PS. some of the photos are 'edited'.