Call of Duty 9: Black Ops 2 What to do if you can’t match anyone?

In Call of Duty 9: Black Ops 2, what to do if you can’t match anyone in Call of Duty 9: Black Ops 2? You can refer to the following:

You can use an accelerator to solve this problem. This problem is caused by network fluctuations. Open the accelerator and select Call of Duty 9. After accelerating, log in to the game.

At this point, players can be matched normally.