http://www.google.com.pk/search?hl=...gle+LZI&btnG=Google+Search&aq=f&aqi=&aql=&oq= no result found for this search.
He probably pertaining ton LSI (Latent Semantic Indexing), read this article Wilsonweb.com/seo/google-lsi.htm
LSI is latent semantic indexing. In all these cases LSI is 'smart' enough to see that Saddam Hussein is somehow closely related to Iraq and the Gulf War, that Tiger Woods plays golf, and that Bayeux has close semantic ties to invasions and England.