If SharePoint site is SSL enabled (https://mukeshdemo.com) then SharePoint search will not give any result.
Log will give following error.
(The secure sockets layer (SSL) certificate sent by the server was invalid and this item will not be crawled.)
Solution: Extend the site and change the Alternate Access Mapping accordingly.
Also in Central Admin –> Application Management –> Manage Search Services –> Ignore SSL certificate warning