Both tineye and google image search rely on right click working. AW disable this for a lot of their site to prevent people copying the images.
You can get around it by pressing F12 on the page with the image you want, and going to "resources" or "sources" and finding them image there. You can then open it in a new window or tab, and right click on it.
If you are technically savvy i have a script i can post which disables some of the AW blockages, but you need to know how to use "Tampermonkey" or "greasemonkey".