You must have noticed while using Google that it provides you a live searching functionality which means as soon you type the WordPress its starts showing results and different dropdown suggestions. Now you can use a similar searching feature in your WordPress site too.
First of all install and activate Dave’s WordPress Live Search plugin in your WordPress site. It adds live searching feature in your WordPress based website.WordPress Google Type Live Search
How It Works? Simple. As soon your blog visitors type keywords in your WordPress site’s search box, this plugin immediately starts its queries searching for the results that matches typed keywords.
In simple words it means that your visitors would be finding their search results they are looking for before they finish typing their query. It requires Javascript, but the search box works normally if JavaScript is not available.