In the search panel at the top right corner (In Mobile it may be hidden behind the Notification Ribbon. Click the x mark to close).  

Type the keyword related to topics covered in the site. As you type the keywords, dVidya would show the search words in highlighted colour  .

Now press enter, all the posts containing the search keyword would be listed. The posts with Title containing the keyword would be listed first, followed by posts containing the search keyword anywhere in the post matching.  Click on the post link to probe further into the selected post.  

Thus, you can instantly search all the post related to the search word. This would immensely benefit readers to instantly search topic of interest from any place in the site.