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Hi Trương Thị Hồng,
Based on your description, the worksheet data was accidentally removed during editing, and you have already checked common recovery locations such as AutoRecover, Unsaved Files, and Previous Versions without locating the missing content.
As a next step, it would be helpful to verify where the workbook was stored when the data was lost:
- OneDrive or SharePoint: Check the workbook's Version History to see whether an earlier copy contains the missing worksheet.
- Local computer storage: Review any backup solution you may use, such as Windows Backup, File History, or third-party backup software, for a copy created before the worksheet was deleted.
If the workbook is associated with a Microsoft 365 account and stored in cloud storage, you may also contact Microsoft Support directly for account-specific assistance in reviewing available file history options.
Please note that this is a user-to-user support forum. Moderators, contributors including external Microsoft employees cannot directly intervene in Microsoft product features or access back-end systems. Our role is limited to providing technical guidance on reported issues, requests, or ideas.
I understand how important this data may be, and I hope a previous version of the workbook is still available.