title: How can I check if multiple strings exist in another string?
body: <p>I have this string:</p>
  
  <pre><code>myStr &lt;- "I am very beautiful btw"
  str &lt;- c("very","beauti","bt")
  </code></pre>
  
  <p>Now I want to check whether <code>myStr</code> includes all strings in <code>str</code>, how can I do this in R? For example above it should be <code>TRUE</code>.
  Many Thanks</p>