If you are using default search on a child site knowing what terms are being searched for on the site is hard to find unless you are using something like Google Analytics. There is a new plugin that will track search terms on a site and it is called WP Search Insights. After you have installed and activated the plugin it will add a new menu item in wp-admin; Tools > WP Search Insights The first part you will be taken to is the dashboard which will show you popular and the recent searches. Also from the dashboard settings of