How to get money from the employer failing to find assests in execution?

Dear Lawyers,

My dad had worked at a company for 33 years.Unfortunately, the company collapsed and he didn't receive salary of previous 3 years and service money for past 33 years.

He filed a case in labor and won the case in his favor. As his visa got expired, he gave fees for execution and left to home country. Now it's two years and no money has been received.

How can I move forward?

When I inquired from the lawyer whom he had given the case, he said the defendant has transferred all his belongings to his children to show that he has no wealth.

Any small piece of advice will be beneficial (Company is not a LLC).