I can't get a job after one year finished college . can I ask for money back?

Sure, you can ask for your money back. The answer will be NO.

College is a service where tuition is paid in advance, even if you accumulate loans to defer payment until later. Whether that service was useful or not depends more on the student than the service provider. Let's say you take guitar lessons for 4 years. Can you get your money back if you don't become a rock star lead guitarist for a professional band? No. You're paying for a service, not for results. You may want results, but that's not what you paid for nor what the service provider agreed to do for you. You might believe people who tell you that you can become a rock star by taking lessons, but that's merely speculation, not a guarantee. At most regionally accredited non-profit universities, a large percentage of the students do end up getting hired in their career of choice. So that proves how success is possible for some, while still depending on the student's ability and use of the services.

That is not how it works. You can't ask for your money back if you can't find a job. Don't forget, no one forced you to go to college.

Nope, because you've already received the education. You payed for an education, NOT a job. Sorry tho, keep looking.