If you're in the US or a country with reciprocal copyright relations to US, you can use the DMCA to force the offending website's ISP to take the content offline. It is very easy and cheap.
Simply type up a letter in English all neat like with no misspellings, slang words or short cuts. State that you are the original copyright holder of the works. Give the date you published your work, and all the offending URL and image file names.
The neat thing with the DMCA is the burden of proof lies on the defendant, not on the rights holder. The ISP must comply under penalty of federal law, and the defendant has the burden of proving they did not steal your work.
Remember, you need to make an actual phyiscal letter, not some email, and don't use slang, short cuts or misspelled words. You should prepare your letter, and have some other people proof read it for you first. Once that is done, you need to send it to google's legal department:
Google, Inc.
Attn: Google Legal Support, DMCA Complaints
1600 Amphitheatre Parkway
Mountain View, CA 94043
Here is more information on Google's DMCA complain process:
https://www.google.com/dmca.html