To start off, you will need to assign keywords to your search engines. Managing your keywords is done through the "Manage Search Engines" window. To find this window, direct your mouse to the dropdown arrow next to the google sign in the upper right corner of your browser. See picture below.
From here, you should see this screen:
After you're done setting up your keywords, click OK. You are now ready to use your keywords and your address bar as a search engine!
In your address bar, type your keyword and your search terms, and click enter. You will receive search results for your term in whichever search engine's keyword you use. You now have a quick and easy way to see search results from your favorite search engines!