<p>To search under a tag, you can either click on the tag, or type <code>[&lt;tag-name&gt;]</code> in the search field.  Once you get to the search returns page, the <em>advanced search options</em> link appears with the guidelines for more sophisticated searches.  However, you don't need that link to appear on the page in order to use those options; from any old page you can type <code>[&lt;tag-name&gt;]+answers:1</code> in the search field to get all the threads tagged with that topic that have at least one answer.  For example, <a href="https://stats.stackexchange.com/search?q=%5Bclustering%5D%2banswers:1">here</a> are the questions tagged under clustering that have one or more answers.  </p>
