Hey there, Lê Trí Đức
It seems that my university’s domain (st.hcmuaf.edu.vn) might not yet be recognized by Azure’s student verification system.
Please can you speak to your IT department at your university and ask them if they are registered the domain on Microsoft and use Microsoft 365. If not, they would need to sign up here: https://www.microsoft.com/education/products/office
Once your university has signed up, they would need to verify they are a school/university. Once this has been completed, they would need to set up their tenant on Azure and add the domain they use. Once this has been done, it will allow you to verify your student status and get student benefits.
I have already successfully verified my student status through the GitHub Student Developer Pack, using the same student email address.
GitHub use a different verification method compared to the Azure Students subscription. GitHub gets you to upload documents to support your academic status. Whereas Azure doesn't do this and relays on their form to verify student status.
Hope this helps,
Nathan