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

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

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

Also, 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)