Hi AWM321,
Thanks for reaching out to the Apple Support Communities. We understand you're not seeing any search results when searching in the iTunes Store, and we'd be happy to help.
To get started, let's give the steps listed in the following resource a try, and let us know if anything here is able to help: If you have problems using the iTunes Store on Mac
If you make any changes the steps shown here, go ahead and restart your Mac and test the issue again.
If still unable to see any search results, try testing the issue in safe mode as this can help to determine whether an issue is caused by software that loads as your Mac starts up. For steps on how to test issues in safe mode, and what to do if the issue doesn't occur in safe mode, check out this link here: How to use safe mode on your Mac
Keep us updated with the results, and we'll continue from there.
Have a great day!