我有表单搜索：

<form action="<?php echo esc_url( home_url( \'/\' ) ); ?>" method="GET" role="form" class="searchform"> 
        <div class="row">
          <div class="col-md-3">
            <input type="hidden" name="post_type" value="tourdl"> 
            <div class="item">
              <label><img src="<?php bloginfo(\'stylesheet_directory\');?>/assets/images/search-1.png" class="img-fluid" alt="">Nơi khởi hành</label>
              <input type="search" name ="noi_kh" placeholder="<?php echo esc_attr_x( \'Search &hellip;\', \'placeholder\' ); ?>">
            </div>
          </div>
          <div class="col-md-3">
            <div class="item">
              <label><img src="<?php bloginfo(\'stylesheet_directory\');?>/assets/images/search-2.png" class="img-fluid" alt="">Điểm đến</label>
              <input type="search" name ="den" placeholder="Nhập nơi đến ...">
            </div>
          </div>
          <div class="col-md-3">
            <div class="item">
              <label><img src="<?php bloginfo(\'stylesheet_directory\');?>/assets/images/search-3.png" class="img-fluid" alt="">Ngày khởi hành</label>
             
              <div class="form-group">
                    <div class=\'input-group date date-book\' id=\'datetimepicker2\'>
                      <input type=\'search\' name="ngay_kh" placeholder="Ngày / tháng / năm" class="inp_date" />
                      <span class="input-group-addon"></span>
                    </div>
                </div>
            </div> 
          </div>
          <div class="col-md-3">
            <div class="item">
              <button type="submit" class="text-uppercase btn-search" id="searchsumit" value="<?php echo esc_attr_x( \'Search\', \'submit button\' ); ?>">Tìm kiếm</button>
            </div>
          </div>
        </div>
    </form>

$post_type  = isset($_GET[\'post_type\']) && $_GET[\'post_type\'] ? $_GET[\'post_type\'] : \'post\';
$di     = isset($_GET[\'noi_kh\']) && $_GET[\'noi_kh\'] ? $_GET[\'noi_kh\'] : \'\';
$den    = isset($_GET[\'den\']) && $_GET[\'den\'] ? $_GET[\'den\'] : \'\';
$nkh = isset($_GET[\'ngay_kh\']) && $_GET[\'ngay_kh\'] ? $_GET[\'ngay_kh\'] : \'\';
$args = array(
    \'showposts\'     => 10,
    \'post_type\'     => $post_type,
    \'meta_query\'    => array(
        \'relation\'      => \'AND\',
        array(
            \'key\'      => \'noi_khoi_hanh\',
            \'value\'     => $di,   
            \'compare\'   => \'Like\'
        ),
        array(
            \'key\'      => \'diem_den\',
            \'value\'     => $den,   
            \'compare\'   =>\'Like\'
        ),
         array(
            \'key\'       => \'ngay_khoi_hanh\',
            \'value\'     =>  $nkh,
            \'type\'      => \'datetimepicker2\',
            \'compare\'   => \'Like\',   
        )
    ),
);

have\\u posts（））：？>have\\u posts（））：$the\\u query->the\\u post（）；？>