the filtered word should be contained within the gamename for it to be picked up.
So for example if the game name is "Poker D NO MUTA!!"
and you filter "muta" ?track game muta
that game will get picked up
the more words you try to filter in one doing, the more specific the filter may get and you may not pick up games.
i.e like ?track game Poker Defense
Will not pick up that above game, since it's exactly looking for "Poker Defense" in the game name.
A viable more accurate filter for filtering poker defense maps for example is either ?track game poker or ?track map poker.
When it comes to tracking game names you want to think of general words most people use when creating games. Unlike maps, which you can filter more specific for a specific map. i.e, ?track map bald locks instead of ?track map sniper , because "bald locks" will track the specific sniper ctf map rather than a generic sniper rpg or something map.