title: How to convert wide string to normal string?
body: <p>This is the first time I encountered this case, </p>
  
  <p>I have read about unicode, ascii but actually it was too difficult for me because I could not distinguish them. My problem is:</p>
  
  <p>I have a text like that in cell O2, when I type in the textbox (in combination with the textbox_change event) I cannot search for O2, after a while debug when i paste text from textbox to O3, now I see they are different but don't know why!</p>
  
  <p>How can i switch from O3 to O2? Please clarify this problem help me! </p>
  
  <p>Thanks you.</p>
  
  <p><a href="https://i.stack.imgur.com/3Njnb.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3Njnb.png" alt="enter image description here"></a></p>
  
  <p>Edit: when I compare the letters at position 2:</p>
  
  <pre><code>1. tấn
  2. tấn
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/HAH2P.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HAH2P.png" alt="enter image description here"></a></p>