Hi @Cuong_Tran_Quoc ,
Most countries have a financial crimes division, particularly those that are part of the international monetary fund.
You may still check with your local law enforcement to see if they would be willing to open an investigation, or direct you to the correct agency for that in your country. They will have way more tools at their disposal than an individual would have to be able to help. It is still a long shot, but at least it can not hurt to try it out and see.
I am really sorry to hear about this - I hope they may be able to help you further.