To narrow your search by the Business Name, use the "Search" filter to type the Business Name, then you can use the "Sort by State" feature to show you those particular businesses in that state:
For Example - Search the keywords: "FedEx" or "Snapple" to narrow the search to listings containing those keywords, then use the "Sort by State" feature to narrow the results down to that state.
When narrowing your search results, right click on each of the listings you wish to view and click "Open link in new window." This way your search criteria will save on the page and you will not have to start your search again.