Content Search Query rules to find all Sub Sites within the Current Site

Query:

contentclass:STS_Web 

Path:{Site.URL} 

Site<>{Site.URL}

How-to:

1. This rule will only show sites. At this stage it shows all the sites across the whole environment.
   
2. This rule will limit the results to sites with the current site. This also include the top level site.
   
3. This rule removed the top level site, thus only showing the sub sites. 
   
4. This rule removed the top level site, thus only showing the sub sites.