Searching for information can be done in many ways. Google is a top search engine biggest in many estimations in referenced pages. Sometimes the answer is buried beneath/behind tons of other 'answer' pages. There are many ways to narrow an online search. Some have favorite domains they'd like to research. Some of those domains have search engines of their own. Some do not. The ability to narrow a search to specifically what is/was on a domain can be a big time saver. To specifically narrow Google searchs to what appears 'only' on those domains, one can use the radio buttons just below the Search box above. Google search engines can be big time savers.