no search result when length of string is bigger than $CONFIG->search_info['min_chars']

inside function search_get_where_sql

At start.php of mod/search when the length of the querystring "cars" (4) is >= than $CONFIG->search_info['min_chars'] (4) there are no search results.

What is the reason for this statement?

 

if (elgg_strlen($query) < $CONFIG->search_info['min_chars'] ) {
        $likes = array();
        $query = sanitise_string($query);
        foreach ($fields as $field) {
            $likes[] = "$field LIKE '%$query%'";
        }
        $likes_str = implode(' OR ', $likes);
        $where = "($likes_str)";