Since CPNN was migrated to a WordPress format in February 2015, it has become more complicated to search the site with key words.
For articles published since February 1, 2015, click on the magnifying glass at the right end of the menu.
For articles published prior to February 1, 2015, go to http://google.com/advanced_search and use the following site name: cpnn-world.org/cgi-bin/read . This is important because Google will NOT search the old site if you put simply cpnn-world.org !