Screenplay etc

Hi !
I'm Barbara from Rome. At present days, I'm attending high school and I'm deeply involved in learning English, although (as you, probably, have just observed) I'm still a beginner.

I download a lot of lyrics from the Internet to read them while listening songs (in English, of course) to get some skill in discerning words.
I would love do the same with movies; I have been searching for days screenplay and dialogs of movies but no result was found because keywords as "screenplay" and "dialogs" rise up advertising, criticism, etc. in thousands.
Please, can you give any hints about finding them ??

Thanks for reading me !!
Best regards.
Barbara