As a movie(film) lover, many times when I tried to find amazing soundtracks and songs from movies that I watched, most of the time it was very difficult and even seemed impossible sometimes.
If you ever had the same issue as mine, I come with good news.
I finally found a website that helps you to find any name of a soundtrack or song from any movie you want.
The website is called Tunefind. Search for the name of a movie you like or want, and you will find all of the soundtracks in it. If it is a movie series you should be able to choose a specific series and episode from which that song comes from, or look at the bottom you will find the list of those songs for the whole series.