I'm pretty sure there may be some. Please check my comment in previous post about DDG https://news.ycombinator.com/item?id=17868117
1. Yandex search results very closely match DDG's in Ukrainian (or did) as opposed to Google/Bing
2. When Yandex could no longer operate in Ukraine, DDG's region for Ukraine disappeared
I am reminded of Hanlon's Razor in this situation, that perhaps in Ukraine they simply did not fix their search after their top index provider was blocked.