Steps to understand:
- Open a page with a lot of text in a diacritic-friendly language (e.g., Spanish, French, German, etc.) in VisualEditor (either mode).
- Search for the text you're trying to find (Command-F) using VisualEditor's built-in Find/Replace feature.
- Miss the typo because you searched for the string ole and someone had typed olé.
If you search for ole; then Find/Replace ought to find all simple variants on these letters, including, e.g., ółę. This is standard behavior for web browsers and search engines and so is likely expected as well as being helpful.