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