Today we’re bringing the Search Box gadget out of Blogger in Draft and making it available to everyone. With this gadget, your readers will be able to search not just your posts, but web pages linked from your blog, your blog list, and link lists.
To add the gadget, go to your blog's Layout page, then click “Add a Gadget” and click on “Search Box.” Configuration is easy: just select which elements you want your readers to be able to search.
Log in to your Blogger account with your username and password. Once you are logged in, make sure you are at your Blogger's Dashboard, otherwise click on the "Dashboard" link, which will take you to a list of your blogs.
Access the Layout page of your blog.
After selecting your blog, click on the "Design" link, which will take you to the Layout page. Click on the "Page Elements" link, then click on "
Add a Gadget."
Choose a widget or gadget.
A Blogger pop-up window will appear that lists all the gadgets available to you through Google Blogger. You may search for the name of a specific gadget, or you can browse through several categories, including Basic gadgets, Featured gadgets, Most Popular gadgets or More Gadgets, which are contributed by third-party developers for Blogger.
Add Search Box widget to Blogger
That's it. Now Visit Your Blog And See The Search Box on Your Blogger Blog.