see screenshot. They have links below their result like Mobile, Samsung Galaxy S II review, Android, etc. even a custom search box? Uploaded with ImageShack.us
They are likely sitelinks which you can find in your google webmaster tools account. Try to get backlinks from quality relevant sites that point to the page or pages you are trying for.
These links are called Sitelinks, as gameuthopia said. You will have an option of adding Sitelinks to your websites in Google Webmaster tools. But you can do much about it other than specifying your sitelinks. If Google thinks these links are important for your website, it will display beneath your listings. Webmasters have very little control over it.