<form method="post" action="search.php">
                    <div class="input-group has-success">
                        <input id="btn-input" name="search" type="text" class="form-control input-md" placeholder="Please type the ID number of the user you want to update..." />
                        <span class="input-group-btn">
                            <button class="btn btn-success btn-md" id="btn-chat" type="submit">Search</button>
                        </span>
                    </div>
                </form>
                </div>


                    <div class="col-md-6">

                        <form role="form">


                            <div class="form-group">
                                <label>username</label>
                                <input class="form-control" placeholder="Placeholder">
                            </div>

                            <div class="form-group">
                                <label>Password</label>
                                <input class="form-control">
                            </div>


                            <div class="form-group">
                                <label>UserType</label>
                                <input class="form-control">
                            </div>

                        </form>

<?php

   $conn = mysqli_connect("localhost", "root", "", "asset_inventory");

     if($conn === false){
       die("ERROR: Could not connect. " . mysqli_connect_error());
     }


   $search = mysqli_real_escape_string($conn, $_POST['search']);


   $sql = "SELECT * FROM  users WHERE user_id='$search'";
   $result = mysqli_query($conn, $sql);

   if (mysqli_num_rows($result) > 0) {

 while($row = mysqli_fetch_assoc($result)) {


    $name=$row['user_name'];
    $pass=$row['user_pass'];
    $type=$row['user_type'];
       }

   } else {
    echo "0 results";
      }


    mysqli_close($conn);
    ?>

if (mysqli_num_rows($result) > 0)
  {
    while($row = mysqli_fetch_assoc($result))
    {
      $name=$row['user_name'];
      $pass=$row['user_pass'];
      $type=$row['user_type'];
    }
  }
  else
  {
    echo "0 results";
  }

<table>

<?php
  if (mysqli_num_rows($result) > 0)
  {
    while($row = mysqli_fetch_assoc($result))
    {

?>

  <tr>
    <td> <?php echo $name=$row['user_name']; ?> </td>
    <td> <?php echo $name=$row['user_pass']; ?> </td>
    <td> <?php echo $name=$row['user_type']; ?> </td>
  </tr>

<?php
    }
  }
  else
  {
?>

  <tr>
    <td colspan="3">0 results</td>
  </tr>

<?php
  }
?>

</table>

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.0.0/jquery.min.js"></script>
<script>
$(function(){
    $(document).on("click", "#btn-chat", function(e) {
    e.preventDefault();
        //Built a url to send
        var info = $("#form").serialize();
        $.ajax({
            type: "POST",
            url: "search.php",
            data: info,
            success: function(result){
                  //$('#respoondarea').load(location.href + '#respondarea');
                  //$("#form")[0].reset();
                  $('#respond').html(result);
            }
        });
        e.preventDefault();
    });
});

</script>
               <form method="post" id="form" action="search.php">
                    <div class="input-group has-success">
                        <input id="btn-input" name="search" type="text" class="form-control input-md" placeholder="Please type the ID number of the user you want to update..." />
                        <span class="input-group-btn">
                            <button class="btn btn-success btn-md" id="btn-chat" type="submit">Search</button>
                        </span>
                    </div>
                </form>

<div id="respond"></div>

<?php

$conn = mysqli_connect("localhost", "root", "", "asset_inventory");
if($conn === false){
       die("ERROR: Could not connect. " . mysqli_connect_error());
}

$search = $_POST['search'];
//$query_user = mysqli_query($conn,"SELECT * FROM  users WHERE user_id='$search'");
$query_user = mysqli_query($conn,"SELECT * FROM  users WHERE user_id LIKE '%$search%' ");
$row_user = mysqli_fetch_assoc($query_user);
$totalRows_user = mysqli_num_rows($query_user);

?>

  <table class="table">
    <thead>
      <tr>
        <th>Username</th><th>User pass</th><th>User type</th>
      </tr>
    </thead>
    <tbody>
   <?php  do { ?>
      <tr>
        <td><?php echo $row_user['user_name']; ?></td>
        <td><?php echo $row_user['user_pass']; ?></td>
        <td><?php echo $row_user['user_type']; ?></td>
      </tr>
<?php } while ($row_user = mysqli_fetch_assoc($query_user));   ?>
    </tbody>
  </table>

 <?php if ($totalRows_user == 0) { // Show if record empty ?>

 <div class="alert alert-info" role="alert"> No record found </div>

 <?php } // Show if recordset empty ?>