Hi Ram,
As I understand, the file share content source does not display in the search result when crawling file share content source successfully.
In addition to Reema Bhingarde, you could check if the user has the permission to view the files on file shares in the search results. You could check the user permission on these files.
The article below is about planning to crawl different kinds of content.
https://technet.microsoft.com/en-us/library/JJ219577.aspx#Section3
The article below is about SharePoint 2013 Set permissions on item level.
https://christopherclementen.wordpress.com/2013/04/23/sharepoint-2013-set-permissions-on-item-level/
Best regards,
Sara Fan