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)
основееі » основеі (Expand Search), основныеі (Expand Search), основі (Expand Search), основе (Expand Search), основні (Expand Search), основіееі (Expand Search), основеееі (Expand Search)
основееіе » основеіе (Expand Search), основныеіе (Expand Search), основіе (Expand Search), основее (Expand Search), основніе (Expand Search), основіееіе (Expand Search), основеееіе (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 основееі ) OR основееіе ))) OR ( ґрунтова основ ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ґрунтова (основіе OR ((основее OR основееі ) OR основееіе ))) OR ( ґрунтова основ ))~".
• Adding a wildcard symbol may retrieve word variants: (( ґрунтова (основіе OR ((основее OR основееі ) OR основееіе ))) OR ( ґрунтова основ ))*.