What does it mean if nothing appears on doing search on the domain?

On doing search on your domain and if nothing appears then there are three possibilities.
1) May be the site is banned by search engines
2) May be no index by search engines
3) Some canonical issues
Hope it helps you..

It means that there might be issue with the sitemap. Or you have not submitted the web pages to the web master. There might be chances of the typo issue or can be issue with your domain registration. Google bots might failed to crawl the pages.