Techniques are described for delivering search results pages to the users of a search engine, where one or more search result listings on the search results pages include one or more items that are associated with links to resources that satisfy a related search and that satisfy a specified condition....http://www.google.com.hk/patents/US20050222966?utm_source=gb-gplus-share專利 US20050222966 - Delivering items based on links to resources associated with search results
