Perhaps you should try some spelling variations:
основеіе » основі (Expand Search), основе (Expand Search), основные (Expand Search), основіе (Expand Search), основее (Expand Search), основіеіе (Expand Search), основееіе (Expand Search)
основні » основі (Expand Search), основіні (Expand Search), основені (Expand Search)
основеі » основі (Expand Search), основе (Expand Search), основіеі (Expand Search), основееі (Expand Search)
основеііе » основііе (Expand Search), основеіе (Expand Search), основіеііе (Expand Search), основееііе (Expand Search)
основ » основі (Expand Search), основе (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 ((основеіе OR основні ) OR (основеі OR основеііе ))) OR ( ґрунтова основ ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ґрунтова ((основеіе OR основні ) OR (основеі OR основеііе ))) OR ( ґрунтова основ ))~".
• Adding a wildcard symbol may retrieve word variants: (( ґрунтова ((основеіе OR основні ) OR (основеі OR основеііе ))) OR ( ґрунтова основ ))*.