if i search the word in google is "twitter".
google display the first result like the below...
Twitter Twitter is without a doubt the best way to share and discover what is happening right now. twitter.com/ - Cached - Similar Search How To Contest Account Suspension Blog An API Twitter_logo_header Twitter Status More results from twitter.com »
how they can display Search,blog,Twitter_logo_header and etc...
thanks and advance...
This page explains how search engines like Google work:
http://computer.howstuffworks.com/internet/basics/search-engine.htm
It's something google decides to do on its own. There is no way you can force them to do it with your site. They will do it if they find it appropriate.
These links are called Site Links, and point to highly rated pages on your domain.
Usually these links are created automatically if your site is strong enough for a specific keyword, and you can tweak it a little by blocking pages you don't want to appear there from Google Webmaster Tools (http://google.com/webmasters) under 'Site Configuration', 'Sitelinks'.
More information on this topic available at the following Google help page - http://www.google.com/support/webmasters/bin/answer.py?answer=47334&hl=en