In Bot Libre questions are automatically matched heuristically. So when you add a new question/response a broad set of question will be matched with the same response.
You can also use keywords to widen the scope, or required words to narrow it, or configure the heuristically match settings from the bot's Learning & Settings page in its Admin Console.
To reuse the same response for multiple questions you can use intent labels. Just label the response i.e. #whatAreMyCourses, then in the other questions enter that label as the response #whatAreMyCourses. Make sure you use the text editor, not the WYSIWYG editor.