Perhaps you should try some spelling variations:
"bortnyk, valentyn OR valentina " » "bortnyk, valentyna OR valentina " (Expand Search), "bortnyk, valentin OR valentina " (Expand Search), "bortnyk, valentini OR valentina " (Expand Search), "bortnyk, valentyn OR valentin " (Expand Search), "bortnyk, valentyn OR valenciana " (Expand Search), "bortnyk, valentyn OR valencia " (Expand Search)