paginasi dengan php

saya punya script seperti ini

$koneksi = mysql_connect('localhost', 'root', '');
$db = mysql_select_db('tugas_akhir');
if(isset($_REQUEST['keyword']) && $_REQUEST['keyword']<>""){
	$keyword=$_REQUEST['keyword'];

	$rpp = 2;
	$page = intval($_GET["page"]);
	$count = 0;
	$i = ($page-1)*$rpp;
	$no_urut = ($page-1)*$rpp;

	$Page_Start = (($rpp*$Page)-$rpp);

	$reload = "index.php?pagination=true&keyword=$keyword";
	$sql =  "SELECT * FROM tb_doc WHERE nama LIKE '%$keyword%' or NIM LIKE '%$keyword%' or wilayah LIKE '%$keyword%' or pembimbing LIKE '%$keyword%' or tahun LIKE '%$keyword%' or tempat_magang LIKE '%$keyword%' or kesimpulan LIKE '%$keyword%' limit '%$Page_start%', '%$rpp%' ";
	$result = mysql_query($sql);

	if($page<=0) $page = 1;
	$tcount = mysql_num_rows($result);
	$tpages = ($tcount) ? ceil($tcount/$rpp) : 1;

}else{

	$reload = "index.php?pagination=true";
}

kenapa hasil pencarian tidak keluar yaa? tapi kalo ngga pake limit di sql-nya bisa