Once you've selected the type of licence you want, you simple hit the blue "Advanced Search" button and your new results will pop up:

Now all these results can be used within your blog any way you please. You can download them and edit/modify them, or simply upload as is.

NOTE: For certain searches this method may not produce the best of results. The best results are usually only on the first page or the top half of the first page. You may have to get creative with your search in order to find that perfect image you've been looking for.

Next up is a method you can do using your keyboard!