Related to http://meta.stackoverflow.com/questions/67931/to-get-all-questions-about-ruby-that-is-unanswered

http://stackoverflow.com/unanswered/tagged/ruby

that is, for questions that has no up-voted answers, is there a way to get questions with 0 answers too?

And is it possible to get it for two tags, such as for CSS and HTML? (update: meaning any CSS or HTML questions with 0 answers)