Why search in the PHP site can only search English and letters, cannot search Chinese

Why the search in the PHP site can only search English and letters, can't search Chinese?
Q: Why search in the PHP site can only search English and letters, can not search Chinese?
Search Chinese, show blank, please heroes, pointing Maze!

 
  if (!mysql_connect ("localhost", "admin", "admin"))
Die ("Could Not Connect:". Mysql_error ());
mysql_select_db ("CESF");
$query = "SET NAMES ' GB2312 '";
mysql_query ($query);
?>

 
  $keyword =$_post[' keyword '];
$contents = Array ();
$rt =mysql_query ("select * from dede_archives where title like '% $keyword% '");
while ($rs =mysql_fetch_array ($RT))
{
$contents []= $rs;
}
?>

Query instance


 
  foreach ($contents as $key = = $value) {
echo "


 
  
  
   
   
  "; Echo"
  
   
   "; Echo" 
   
 
    
 
     
$value [title]
 
    
 
  
  
";
}
?>

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------Solution--------------------
Print out the SQL statement to see if the SQL statement is normal (mainly guessing that the Chinese parameters obtained may be garbled
------Solution--------------------

------Solution--------------------
Print SQL directly to see if the database has values.

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