Question: What is Al-fatawa Al-hindiyya? who wrote it? and why we dont see evidenses in those books?
Answer: This is a book of fatawa of the Hanafi school preferred by a council of scholars that got together in India. It is a reliable book. Books of fatawa do not usually contain proofs because that is not their purpose. There are other books for that. Fatawa books are meant for scholars only, not the general public, and scholars are aware of evidences.
... and Allah knows best.