invulnerable

I'm trying to make a dynamic app to allow users to search by game name and expected year release. How would I go about making this call? I've tried:

http://www.giantbomb.com/api/games/?api_key=API_KEY&filter=expected_release_year:2013,name:battlefield3&format=json&limit=5&sort=original_release_date:asc

amoungst other things replacing the comma. How would I go about making this call to return both filters?