Perhaps you should try some spelling variations:
основіе\ » основі\ (Expand Search), основе\ (Expand Search), основные\ (Expand Search), основііе\ (Expand Search), основеіе\ (Expand Search)
основіеіе » основііе (Expand Search), основеіе (Expand Search), основныеіе (Expand Search), основіе (Expand Search), основее (Expand Search), основніе (Expand Search), основііеіе (Expand Search), основеіеіе (Expand Search)
основіеі » основіі (Expand Search), основеі (Expand Search), основныеі (Expand Search), основі (Expand Search), основе (Expand Search), основні (Expand Search), основііеі (Expand Search), основеіеі (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 основіеіе ) OR основіеі )) OR (\ ґрунтова основ\ ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\ ґрунтова ((основіе\ OR основіеіе ) OR основіеі )) OR (\ ґрунтова основ\ ))~".
• Adding a wildcard symbol may retrieve word variants: ((\ ґрунтова ((основіе\ OR основіеіе ) OR основіеі )) OR (\ ґрунтова основ\ ))*.