jquery를 사용하여 확인란 값을 필터링 할 수 없습니다.

(function($) {
  $(document).ready(function() {
    // Options search field
    $('#options').before(
      '<input id="search" style="display: inline; width:180px;" type="text" />' +
      '<span><a href="" onclick="return false;" id="search-clear">X</a></span>'
    );
    $('#search').keyup(function() {
      var valThis = $(this).val().toLowerCase();
      $('input[type=checkbox]').each(function() {
        var text = $("label[for='" + $(this).attr('id') + "']").text().toLowerCase();
        (text.indexOf(valThis) == 0) ? $(this).parent().show(): $(this).parent().hide();
      });
    });
    // Search clear button
    $("#search-clear").click(function() {
      $("#search").val("");
      $('input[type=checkbox]').each(function() {
        $(this).parent().show();
      });
    });
  });
})(jQuery);

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<div id="options">
  <div class="col s12  ">

    <label>Server</label>

    <div id="id_form-0-server">
      <ul>
        <li class="">
          <label>
            <input type="checkbox" name="form-0-server" value="ABC" id="id_form-0-server_0"> 
            <span>ABC</span>
          </label>
        </li>
        <li class="">
          <label>
            <input type="checkbox" name="form-0-server" value="EFD" id="id_form-0-server_1">
            <span>EFD</span>
          </label>
        </li>
        <li class="">
          <label>
            <input type="checkbox" name="form-0-server" value="KIS" id="id_form-0-server_2">
            <span>KIS</span>
          </label>
        </li>
        <li class="">
          <label>
            <input type="checkbox" name="form-0-server" value="PNJS" id="id_form-0-server_3">
            <span>PNJS</span>
          </label>
        </li>
        <li class="">
          <label>
            <input type="checkbox" name="form-0-server" value="PJSGRA" id="id_form-0-server_4">
            <span>PJSGRA</span>
          </label>
        </li>
        <li class="">
          <label>
            <input type="checkbox" name="form-0-server" value="KLSCV" id="id_form-0-server_5">
            <span>KLSCV</span>
          </label>
        </li>
      </ul>
    </div>
  </div>