title: How to override default search in Magento?
body: <p>I am working on a Magento site, and i would like to edit the default search result.</p>
  
  <p>Editing search result is not editing the appearance of search result but the actual search results generated.</p>
  
  <p>The idea is, if the Magento search does not return any value then i need to do a search in my custom table to fetch some relative products.</p>
  
  <p>Could anyone help me to edit the default Magento search??</p>
  
  <p>Thanks a lot in advance.</p>