Start with Archive.org using the exact Telugu search term దేవీ భాగవతం . If you need a clear, complete, modern Telugu version, purchase the Gita Press edition (e.g., "Devi Bhagavatam – Telugu Translation by Shri Hanuman Prasad Poddar").
May the Divine Mother bless your study. 🙏 devi bhagavatam pdf telugu