Apache htaccess重定向到404

I have this link which i access:

 http://domain.com/search/csgo/US/nameorip/?matching=dust2

.htaccess looks like this:

RewriteRule ^search/([a-z_]+)/([A-Z_]+)/([a-z]+)/?matching=(.*)?$   servers.php?game=$1&location=$2&query_by=$3&matching=$4 [NC,L]  

After i access this link, I'm redirected too 404 page. Why ? What is wrong with my .htacces File ?

EDIT: I read documentation and I think a problem is at matching, right ?

You can try:

RewriteCond %{QUERY_STRING} ^matching=([^&]+)$ [NC]
RewriteRule ^search/([a-z_]+)/([A-Z_]+)/([a-z]+)/?$ servers.php?game=$1&location=$2&query_by=$3&matching=%1 [NC,L]