Google is famous for the brilliance of its algorithm for searching web pages, so why we don't take advantage of such tools? To search content on specific website, we trigger a search by appending site parameter in following ways-

<Search term> site:computerknow.org

QueryDescription
<Search term> site:computerknow.org Returns result for given terms.
"<Search term>" site:computerknow.org Returns result for given terms, without breaking the token.

Get more insight on how google search works here.