Perhaps you should try some spelling variations:
"gorbach, michail [1931-2022]" » "horbach, michail [1931-2022]", "vorbach, michail [1931-2022]", "rohrbach, michail [1931-2022]", "gorbach, michael [1931-2022]", "gorbach, michal [1931-2022]", "gorbach, michaela [1931-2022]"
"gorbachev, michail [1931-2022]" » "horbachev, michail [1931-2022]", "vorbachev, michail [1931-2022]", "rohrbachev, michail [1931-2022]", "gorbachev, michael [1931-2022]", "gorbachev, michal [1931-2022]", "gorbachev, michaela [1931-2022]"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"gorbach, michail [1931-2022]\") OR (\"gorbachev, michail [1931-2022]\"))*".
• Removing quotes may allow a broader search: (( gorbach, michail [1931-2022] ) OR ( gorbachev, michail [1931-2022] ))*.