Google is today synonym for internet search. When i was in my college in India (Let me accept this, i did not knew much about internet those days), my professor of computer algorithms gave us an example of Google search to search internet.

But do we really search whole internet while we use google.com or for that matter any other search engine like yahoo or bing? The answer is No. This may surprise you but the technical fact is that when you search using any search engine available on internet, you actually search on the web sites and web pages stored in the internal web page repository of that search engine.

Here is how google search engine works:

Search engines crawl regularly the web sites on internet to create a repository of useful pages (as all pages on inetrnet are not good ones). When you do a asearch, they try to search in their repository to give you the best results for your query. Hence, you may not be able to get the web page which page has not yet been included in search engine's repository.

This is essentially one of the reason why the newly created websites are not listed in search from day one of their launch.

All search engines take some time to index (Include new pages/sites in their repository).