Yes. You may be able to apply for one Student visa covering two or more courses if the courses fit together and show reasonable study progression.
Packaged courses let a student apply for one visa covering several courses where one course leads to the next.
The main course is usually the course with the highest AQF level. It can affect what financial and English evidence you need.
The courses should be related and show reasonable progress in your study pathway. If the courses are unrelated or do not show much progression, Home Affairs may look more closely at whether you are a genuine student.
To cover the full package, you generally need a CoE for each course. If you only provide the CoE for the first course, the visa may only cover that first course.