ขอความช่วยเหลือเรื่องการ search ในหลาย ๆ field ครับ

<?php require('Connections/book.php'); ?>
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "") 
{
  if (PHP_VERSION < 6) {
    $theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
  }

  $theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue);

  switch ($theType) {
    case "text":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;    
    case "long":
    case "int":
      $theValue = ($theValue != "") ? intval($theValue) : "NULL";
      break;
    case "double":
      $theValue = ($theValue != "") ? doubleval($theValue) : "NULL";
      break;
    case "date":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;
    case "defined":
      $theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
      break;
  }
  return $theValue;
}
}

$maxRows_search = 10;
$pageNum_search = 0;
if (isset($_GET['pageNum_search'])) {
  $pageNum_search = $_GET['pageNum_search'];
}
$startRow_search = $pageNum_search * $maxRows_search;

$colname_search = "-1";
if (isset($_POST['key'])) {
  $colname_search = $_POST['key'];
}
mysql_select_db($database_book, $book);
$query_search = sprintf("SELECT * FROM book_data WHERE book_name_en LIKE %s ORDER BY book_name_en ASC", GetSQLValueString("%" . $colname_search . "%", "text"));
$query_limit_search = sprintf("%s LIMIT %d, %d", $query_search, $startRow_search, $maxRows_search);
$search = mysql_query($query_limit_search, $book) or die(mysql_error());
$row_search = mysql_fetch_assoc($search);

if (isset($_GET['totalRows_search'])) {
  $totalRows_search = $_GET['totalRows_search'];
} else {
  $all_search = mysql_query($query_search);
  $totalRows_search = mysql_num_rows($all_search);
}
$totalPages_search = ceil($totalRows_search/$maxRows_search)-1;
?>
<table width="200" border="0.5">
  <tr>
    <td>ID</td>
    <td>EN</td>
    <td>TH</td>
    <td>Country</td>
  </tr>
  <?php do { ?>
    <tr>
      <td><?php echo $row_search['book_id']; ?></td>
      <td><?php echo $row_search['book_name_en']; ?></td>
      <td><?php echo $row_search['book_name_th']; ?></td>
      <td><?php echo $row_search['country']; ?></td>
    </tr>
    <?php } while ($row_search = mysql_fetch_assoc($search)); ?>
</table>
<?php
mysql_free_result($search);
?>