The plugin doesn't hide an item if there is a match inside a tag that does not have the .searchable class. In the code example below, the search "Name Surename" would have a match, but this tag does not have the ".searchable" class.
<div class="isotope-item">
<div class="image-wrapper">
<img src="images/default/bg3.jpg" alt="">
</div>
<div class="info">
<h2 class="title searchable">Lorem Ipsum Dolor Aside kenneth</h2>
<p class="description searchable">Nullam quis risus eget urna mollis.</small>
</div>
<div class="comment">
<p>Name Surename</p>
<p>Morbi leo risus, porta ac consectetur ac, vestibulum at eros.</p>
</div>
</div>