title: Increase the keywords library
body: <p>I have been trying Machine Learning algorithms for text classification. It works pretty well. However, I also want to add an automatic feature of addition of new keywords in my keywords library. For example, my current library is like the following:</p>
  
  <pre><code>[
  [food,eat,drinks],
  [travel, explore, visit],
  [business, work, future]
  ]
  </code></pre>
  
  <p>Now, I try to import a random string. For example:</p>
  
  <pre><code>importString = "I am Harish. I am a foodie. I do not like long journeys. I am an entrepreneur."
  </code></pre>
  
  <p>After importing the above string, I am removing all the stop words first, and then I want to automatically update my library (without human help) such as:</p>
  
  <pre><code>[
  [food, eat, drinks, foodie],
  [travel, explore, visit, journeys],
  [business, work, future, entrepreneur]
  ]
  </code></pre>
  
  <p>Is there any way (in the field of Machine Learning or Deep Learning) to accomplish this task?</p>