What is the movie where a girl is sent to a boarding school for girls until there is a war and then she is sent to an orphanage from which she escapes to try to find her way home to her grandfather?

The movie you're describing is "The Book Thief," based on the novel by Markus Zusak. It follows a young girl named Liesel who is sent to live with a foster family in Nazi Germany during World War II. While the story does explore themes of war and displacement, it does not specifically feature a boarding school or an orphanage. Instead, Liesel finds solace in books and her relationships with the people around her while navigating the challenges of the time.