In general breadcrumbs describe location of a page in website architecture hierarchy. The principle of search is that is not part of website’s navigation/architecture, it is a helper functionality, this is why it is not common to place a breadcrumb on search results page.
I agree with you when drilling deeper in Telerik website and get no search results when searching you don’t have to repeat your steps to go where you started searching. That’s why our developers will do their best soon to offer a link to go back to the place where you started searching when you don’t get any results from search.
Check out Telerik Analytics, the service which allows developers to discover app usage patterns, analyze user data, log exceptions, solve problems and profile application performance at run time. Watch the videos
and start improving your app based on facts, not hunches.