Hello @Trần Tuấn
Thank you for reaching out to Microsoft Q&A and I'm so sorry to hear about your Minecraft Account situation.
Since Minecraft Premium account now linked with Microsoft account you can visit this address to lookup your Minecraft account name to see if it still active Forgotten your Microsoft account username, then if you can't login to that account, please click on this link Recover your Account
To received further support related to gaming topic, you can also refer to Xbox support
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.
Haytham - MSFT | Microsoft Q&A Support Specialist.