Hello, Dima!
Welcome to the community.
There's a open bug that you can check here on the search function
TRELLO-633—Search functionality on the Desktop app isn't working correctly
As of right now, I don't have an ETA to share when this fix will be released, as it will depend on various factors, such as our team's backlog and the complexity of the bug itself.
Nonetheless, with the link I've sent above, you should be able to watch this issue by clicking on the option "Start watching this issue" on the right-side panel. This action will also ensure you're notified via email when our team updates the issue.
Kind regards
Alisson
Trello Team
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