In the News app, personalized news can be setup by entering a search string. These are created under Topics.

Does anyone know what filter to add to have the results restricted by date (as only items for the last week) or to change the results filter to "most recent" rather than "best match". These are capabilities of Bing when searching in News on the web. So I thought they could be achieved in the News App as well. Other filters (like domain: ) work when added to the search terms. I don't know whether there is similar filter term for restricting the date of items displayed.