When you want to run a search directly from Google's address bar (a.k.a. Omnibox) just type a question mark (?) followed by a keyword. The default search engine is Google. To change the default search engine to anything you want go right-click inside the address bar and select “Edit search engines.” You can choose from a predefined list, or create your own.

Here is how to create your own shortcut to search the site of your choice directly from Google Chrome's Omnibox.

1) Right-click inside address bar and select “Edit search engines.”
2) With that dialogue box remaining open, now go to a website you would like to create a custom search for. For the sake of example try Dictionary.com
3) Once you visit the site now look at your “Search Engines” configuration window and you'll notice under the “Other search engines” field Dictionary.com has been added.
4) Next you'll want to change the “Keyword” to something short and easy to remember such as DIC.

will try it..seems great..thnx for shAring..