To increase your job matches and enhance your chances of getting a job , the key is not to be too specific with your job requirements. Whether it is summer job , part time job or work experience or any student job that you apply for, ensure that you CV is well written and up to date. Respond to all your offers to increase your chances of being invited for an interview.
Once you have secured an interview do your research on the company (what do they do, what do they stand for, etc) and have answers prepared for when they ask you questions. Preparation is crucial to be successful.
If you don't get chosen, don't worry. Keep applying and you will soon be successful.