Step 1: first, you can search Google for any course. 1st go to google and then search for that specific course. And after the course title, just add free. Like,
Adobe Premiere Pro CC Video Editing Course Beginners To Pro Free
Step 2: which course you want to get then copy the title and search to this site
Here you can find almost every courses.
coursecatalog.us cursosdev.com udemycourses.me