Perhaps you should try some spelling variations:
основе » основі (Expand Search), основіе (Expand Search)
основеііе » основіііе (Expand Search), основііе (Expand Search), основнііе (Expand Search), основіеііе (Expand Search)
основеіе » основііе (Expand Search), основі (Expand Search), основні (Expand Search), основные (Expand Search), основіе (Expand Search), основніе (Expand Search), основіеіе (Expand Search)
основеі » основіі (Expand Search), основі (Expand Search), основні (Expand Search), основіеі (Expand Search)
основ » основі (Expand Search)

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( ґрунтова (((основе OR основеііе ) OR основеіе ) OR основеі )) OR ( ґрунтова основ ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ґрунтова (((основе OR основеііе ) OR основеіе ) OR основеі )) OR ( ґрунтова основ ))~".
• Adding a wildcard symbol may retrieve word variants: (( ґрунтова (((основе OR основеііе ) OR основеіе ) OR основеі )) OR ( ґрунтова основ ))*.