http://social.technet.microsoft.com/wiki/tags/[tag1]/[tag2]/[tag3]/default.aspx
http://social.technet.microsoft.com/wiki/tags/pt_2D00_BR/SQL+Server/default.aspx
Example 2: I want all the SharePoint articles written in English. That means I use the "en-US" and "SharePoint" tags:
http://social.technet.microsoft.com/wiki/tags/SharePoint/en_2D00_US/default.aspx
Example 3: I want all the articles that are about PowerPivot, Excel, and are known issues. That means I use the "PowerPivot", "Excel", and "Known Issues" tags:
http://social.technet.microsoft.com/wiki/tags/PowerPivot/Excel/known+issues/default.aspx