Hey there, @LSE.
Welcome back, and thank you for trying what @BettyJaneB recommended. Since everything disappears after you filter and choose the accounts you want to see, the next best course of action is to troubleshoot for data damage. The reason for this is that when reports don't populate properly, there's usually an issue with the information within the file. To troubleshoot this, you have a couple of diagnostic tools at your disposal: a rebuild and a verify.
These tools comb through your file, repair data damage, and diagnose anything that needs to be manually fixed. Here's how to find and run them:
Run the Rebuild Data utility:
Run the Verify Data utility:
For more on reports and incorrect data, see: Resolve incorrect or missing data on a report.
Note: This article also includes steps for troubleshooting data damage under the section "Possible data damage".
After running the rebuild and verify, try running your report once more. You should now be able to create a report that is filtered by the Account the PO was charged to, as well as the information typed into the Memo. Should you have any questions about this, or anything else QuickBooks, don't hesitate to seek me out here in the Community.