You should search at [stackexchange.com][1]
 
![enter image description here][2]




[Blog post:][3] 
> We just added a custom Google search for all of our sites at the top of http://stackexchange.com.


  [1]: http://stackexchange.com
  [2]: https://i.sstatic.net/sE169.jpg
  [3]: http://blog.stackoverflow.com/2010/10/search-all-stack-exchange-sites/