How Ctrl+F should search for words? I don't understand then. If i need to search for words where letter O, should chrome search find and highlight all words with Zero "0" also?

The bug is, that chrome recognise letter Ё and Е as same. But this two letters are different, has different buttons on keyboard, different keyboard code and they look different. Please fix this bug! If I open webpage on wikipedia about letter Ё (Yo), and want to find all words with this letter, chrome find me 1k uncommon words, and highlight them. This is unacceptable.

According to the wikipedia page about leter Ё, currently it must be used only where incorrect reading is possible. In other cases it's optional to use "ё" or "е".
That is totally different from your example with zero. "0" is not widely used as "o" and such usage is against orphography rules.
And in case you really need to highlight all letters "Ё" you are free to use bookmarklet like this:
javascript:(function(){document.body.innerHTML = document.body.innerHTML.split('Ё').join('<span style="background-color: yellow">Ё</span>');})();

Same thing with other diacritics: "jaa" is not the same as "jää". If I search for "jää" I want that only those are returned. 

Archiving old bugs that haven't been actively assigned in over 180 days.

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Archiving old bugs that haven't been actively assigned in over 180 days.

If you feel this issue should still be addressed, feel free to reopen it or to file a new issue. Thanks!