title: Detect combination of letter, numbers special characters between round brackets
body: <p>I would to know how to detect letters, combination letters and numbers between rounded brackets. In my examples below, it must not detect the year.</p>
  
  <p>Detect:</p>
  
  <pre><code>Sample (test 2011)
  Sample (test-2011)
  Sample (test)
  </code></pre>
  
  <p>Do NOT detect</p>
  
  <pre><code>Sample (2011)
  </code></pre>