“Search This Blog" is not Working on Blogger

After searching for 1 Hour I got final below solution that fixed my blog search issue.

First check yours to see if it works.  If not go to your layout page and remove the current gadget. Next you need to add an Html/ Javascript gadget  to your page.  You need to paste the following into the gadget where YOURBLOG is obviously the site for your blog:

<form action="http://www.YOURBLOG.com/search" name="input" method="get">
<input value=" " name="q" size="20" type="text"/>
<input value="Go!" type="submit"/>
</form>