Perhaps you should try some spelling variations:
основіеі\\" » основі\\" (Expand Search), основе\\" (Expand Search), основні\\" (Expand Search), основііеі\\" (Expand Search), основеіеі\\" (Expand Search)
основеіа\\" » основі\\" (Expand Search), основе\\" (Expand Search), основні\\" (Expand Search), основіеіа\\" (Expand Search), основееіа\\" (Expand Search)
основніа\\" » основні\\" (Expand Search), основі\\" (Expand Search), основные\\" (Expand Search), основініа\\" (Expand Search), основеніа\\" (Expand Search)
основ\\" » основі\\" (Expand Search), основе\\" (Expand Search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "\"\\"((\\\"ґрунтова (основіеі\\\" OR (основеіа\\\" OR основніа\\\"))) OR (\\\"ґрунтова основ\\\"))\\"\"".
• Removing quotes may allow a broader search: ((\ ґрунтова (основіеі\ OR (основеіа\ OR основніа\ ))) OR (\ ґрунтова основ\ )).