Collect Specific Rows from txt file : <p><a href="https://i.stack.imgur.com/6rmL2.png" rel="nofollow noreferrer">sample of the txt file</a>    </p>

<p>I want to extract the whole lines from a txt file which has <strong><em>NVSS</em></strong> keyword and export it as a new txt file but I have no idea how to do this.
Thank you</p>
