Below is an image of Basic Search page. There are two search options below the search box: Articles and Case Law. The default option is for Articles. The Basic Search works just like searching "regular" Google. You simply enter your terms in the search box and hit enter or click on the magnifying glass icon to the right of the search box.
ONCE YOU HAVE A SEARCH RESULT, you will see options on the left side of the page that let you limit your search: