I don't see data anymore for "searches with no results", why?

It may be due to a tagging default. As specified in our online user guide, it is necessary to populate the property ise_page: '0' within your tag. Please find more information by clicking on the following link: https://developers.atinternet-solutions.com/piano-analytics/data-collection/how-to-send-events/standard-events#internal-search-engine