You are trying to search a recordset with the value from the recordset instead of using the form element.
Instead of:
$rsSeach->bindParam("c", "".($rsSeach->getColumnVal("files")) ."", "-1xxx"); //varKeyword
it should be:
$rsSeach->bindParam("c", "".(isset($_GET["keyword"])?$_GET["keyword"]:"") ."", "-1xxx"); //varKeyword