Colleges only provide a certain amount of space for courses to be listed on applications, and there is not a way to get more space in this section of the application. However, keep in mind that the college will receive your transcripts and see all of the other courses you have completed. You may also email the admissions department at your prospective college with a list of all of your course to add to your application.
As you are filling out this information, note that if you took college-level courses in high school, the courses should be listed in the high school section. If you are transferring from another college or university, you should enter information about your courses at that institution in the college section of the application.