Hey there!
The red boxed error message indicates that you tried listing your products in both countries, Vietnam & the United States. This is not allowed with a standard Google Merchant Center account.
Short tip:
The standard GMC account is not accepting more than 1 shipping destination. The shipping destination may not differ from your shop`s country.
e.g if your shop is registered for Vietnam, you should only set up the Merchant Center details for Vietnam (Shipping Informations etc)
Delete the country details, that are not matching your unique shop country.
Then contact Google again, regarding your account.
If you want to market your products in various countries, you will need to request a “multi-client account” from Google.
Please visit: https://support.google.com/merchants/answer/188487?hl=en
Your current Merchant Center account will become a subdivision of the new multiple client account.
Once your new multi-client account is confirmed, you can create additional shipping regions in line with your current Merchant Center account.
In general I’d suggest always to get in contact with GMC Service at first. They will tell you what caused a suspension and what needs to be done, to fix this.