After you run your search, you can use the boxes over to the left to limit things. Click on Timeline to adjust the date. Click on Publication Type to select Newspapers. You can use Location by Publication to select any/all US States.
NOTE: running an additional search resets all these limits, and you'll need to click them again.
After you search, use the left to limit by Source Type to Newspapers. Click on Enter a date range to enter the date.
Word count for the article: click through title and scroll to the bottom.
Note: these limits will remain if you do another search from the top of the page.