问题的前提是你先正确的开启了并正确设置了搜索功能，在后台设置，如果不会可以自行参考官方的使用文档，如果正确开启了还不行就看下面吧

1.找到 phpcms/modules/search/index.php 文件，打开并编辑。

2.查找代码：

//如果分词结果为空
if(!empty($segment_q)) {
	$sql = "`siteid`= '$siteid' AND `typeid` = '$typeid' $sql_time AND MATCH (`data`) AGAINST ('$segment_q' IN BOOLEAN MODE)";
} else {
	$sql = "`siteid`= '$siteid' AND `typeid` = '$typeid' $sql_time AND `data` like '%$q%'";
}

$result = $this->db->listinfo($sql, 'searchid DESC', $page, 10);

替换为：

//如果分词结果为空
if(!empty($segment_q)) {
	$sql = "`siteid`= '$siteid' AND `typeid` = '$typeid' $sql_time AND MATCH (`data`) AGAINST ('$segment_q' IN BOOLEAN MODE)";
} else {
	$sql = "`siteid`= '$siteid' AND `typeid` = '$typeid' $sql_time AND `data` like '%$q%'";
}
$sql = "`siteid`= '$siteid' AND `typeid` = '$typeid' $sql_time AND `data` like '%$q%' ";
$result = $this->db->listinfo($sql, 'searchid DESC', $page, 10);

仔细看，实际上就是加了一行 

$sql = "`siteid`= '$siteid' AND `typeid` = '$typeid' $sql_time AND `data` like '%$q%' ";

然后搞定。