dbconnectionManager.getConnection().collection('abc').find({
        $text: {$search: searchText}},{score: {$meta: "textScore"}})
            .sort({score:{$meta:"textScore"}
           }).toArray(function(err, result) {
            if (err) {
                console.error("Error occurred while fetching by text." + err);
                callback(err, null);
            } else {
                callback(null, result);
            }
        });