The right way to do it is to first have the money on a US bank account.
Make sure you have a Credit card and not a Debit card. Big difference.
Make few payment with the card you already have so their is some activity and repay on time, Not the full amount each time but the minimum on so forth every cycle.
Try to make few deposit as well. Helps a lot, too.
Your Credit history is still to young.
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