Since the film is an adaptation, the "full text" may refer to the original book. You can find the novel at major retailers or libraries: Goodreads (Reviews and excerpts)
If you are looking for the related to this movie, it typically refers to one of the following: 1. Movie Script (Screenplay)
If you need the dialogue text to accompany the video file, you can download subtitle files from dedicated repositories. Common sites include: OpenSubtitles YIFY Subtitles 3. Original Novel
The screenplay was written by Jenna Lamia. While the complete official script is not always publicly hosted, you can often find draft versions or transcripts on script-sharing platforms like: Springfield! Springfield! (Movie transcripts) Script Slug (Formal screenplays) 2. Subtitles (SRT File)