Vi/Vim Dictionary Get Whole Line
<p>I have a dictionary file used to autocomplete in VI. I know that I need use "CTRL+ X, CTRL+K" for search and autocomplete word or line.
Example file dic.:</p>

<blockquote>
  <p>xi_x1_a1</p>
  
  <p>xi_x1_a2</p>
  
  <p>xi_x1_a3</p>
  
  <p><strong>xi_x1_a4</strong></p>
  
  <p><strong>xi_x2_a4</strong></p>
  
  <p>xi_x1_a6</p>
  
  <p>xi_x1_b</p>
  
  <p>...</p>
</blockquote>

<p>In Vi/Vim if I enter: xi "CTRL+X, CTRL+k", then I will receive all line in the dictionary at the cursor. It is not useful because my dictionary file has many lines.</p>

<p>How can I only enter "a4, CTRL+x, CTRL+k"? Then I only get  two match lines in the cursor for autocomplete line.</p>

<blockquote>
  <p><strong>xi_x1_a4</strong></p>
  
  <p><strong>xi_x2_a4</strong></p>
</blockquote>

<p>Thank for help.</p>