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