Search results can be filtered in a number of ways. When the results of your keyword search produces a large list, you can focus the results by selecting any of the filters located in the Narrow By column.
A search of the News content area for articles on "Project Fi" produces a results list of over 10,000 news items. Notice the Narrow By column located in the left-hand pane of the results page. Use any of the drop-down menus to filter the results by date, geographic region, subject, publication, language, etc.