Google has a new tool that helps make searching easier- the Google Wonder Wheel!
To use it you simply enter your search in the Google box as you normally do and click on Search. Once your results show up, click on the words Show Options which will appear on the left side of your screen. One of the options is Wonder Wheel. Click on it and it will take your results and turn them into a wheel.
Your results are then displayed as a concept concept map. New search results will be displayed as branches of that map. Clicking on any of the new small branches will break down that subcategory even further. The listed results will appear next to your Wonder Wheel.