Those who already purchased the script, please update to the last version as I improved it with a tons of new features (scroll down to see the changelog) ;-).
Advanced PHP Search Engine using Bing API system, it gives you results for Web, Images, Videos, also supports lots of operands like "site:", "link:" etc, have various features like "Safe Search", and more... the design is based on Metro UI, but you can modify how ever you want, because it uses .html files for template.