Currently, I am an office worker. Can I register for voluntary social insurance for my whole family? If possible, what procedures do I need to follow?

I am 55 years old this year, have participated in social insurance for 22 years and is eligible for retirement. Can I pay for another 8 years? And what regime will I benefit from?

From 1987 to 1999, my mother worked as a worker and participated in compulsory social insurance. Since 2000, my mother has quit her job. My mother is now 52 years old and wants to participate in voluntary social insurance to receive pension. So if my mother chooses the payment rate of VND 2 million per month and pays in 2 times, how much will my mother's monthly pension will be? And how to calculate that? Sincerely thank you.

Is the probationary period of time for a heavy, harmful, hazardous occupations or work be counted in the period of engaging in heavy, harmful, hazardous occupations or work?

I quit my job on January 4, 2020 and I also have a need to claim the one-off social insurance. So when can I come to file for the withdrawal?

I had worked in the company No.1 and participated in social insurance for 3 years and 9 months and have received the 1st unemployment insurance of 3 months. Then I switched to the company No.2 and joined the social insurance for 4 months, then switched to the company No.3, which had interrupted the time of participating in social insurance. Here is the case: When I move to the company No.3, do I have to work for 12 consecutive months to enjoy the 2nd unemployment insurance, or only for 8 months (in the company No.3) then add 4 months (from the company No.2) which will be 12 months in total in order to be eligible to receive the 2nd unemployment insurance? And how many times can a person receive unemployment insurance?

My wife works at the company and has been paying social insurance premium from June 2018 to May 2019, then quit. At the end of June 2019, she gave birth. So, can my wife be entitled to unemployment benefits and maternity leave at the same time?