PDO(bindValue）不喜欢我的通配符

我有一段来自表单的简单文本，我想传递给占位符，它可以处理其他文本。无论出于什么原因，当我用"有趣"这个词搜索时，脚本都会失败。

这是我的密码。通常情况下，这是直截了当的，但我似乎无法理解这一点。任何想法都值得赞赏。

    $search = $_POST['searchInput'];
    $search = strtolower($search);
    $search = '%'.$search.'%';
    try {
        $sqlSearch = "SELECT items.item_id,item_detail,auc_id,item_desc,categories,min_bid_increment,auc_start,auc_end,display_item,bidder,amount_bid FROM items
                LEFT JOIN bid_history ON items.item_id = bid_history.item_id
        WHERE org_id = :orgid
        AND auc_id NOT LIKE 'live%'
        AND display_item = '1'
        AND item_detail LIKE :searchInput
        OR item_desc LIKE :searchInput
        OR items.item_id LIKE :searchInput
        ORDER BY items.item_id ASC, bid_history.amount_bid DESC;";
        $sSearch = $pdo->prepare($sqlSearch);
        $sSearch->bindValue(':orgid',$org_id);
        $sSearch->bindValue(':searchInput',$search);
        $sSearch->execute();
        $resultsSearch = $sSearch->fetchAll();
    }
    catch (PDOException $e) {
        echo $e;
    }

编辑：

如果我手动将这个查询放入数据库，我会得到结果。

SELECT items.item_id,item_detail,auc_id,item_desc,categories,min_bid_increment,auc_start,auc_end,display_item,bidder,amount_bid FROM items 
    LEFT JOIN bid_history ON items.item_id = bid_history.item_id
    WHERE org_id = 'CHS102915' 
    AND auc_id NOT LIKE 'live%' 
    AND display_item = '1' 
    AND item_detail LIKE '%fun%'
    OR item_desc LIKE '%fun%'
    OR items.item_id LIKE '%fun%'
    ORDER BY items.item_id ASC, bid_history.amount_bid DESC