Displaing Cyrilic letters in blog title and post

Hi,
I tried a couple different plugins (webfonts and cyr-cho) to try to display cyrilic letters on my blog. I have the letters in the title and in the post itself. When I tried cyr-cho plugin, it did change the link url to display the Russian words (cyrilic letters) but then the page itself wasn’t clickable and I got a 404 error. So, I deactivated this plugin. When I tried webfonts, nothing happened.
Here is a link to a sample post: https://annasrecipebox.com/2009/02/04/meat-filled-flat-bread-%D0%BB%D0%B5%D0%BF%D0%B5%D1%88%D0%BA%D0%B0/
The questionmarks should be words.
Any ideas what I should try next?

Thanks in advance for any help.