There are a number of options:
You could arrange phone calls/online interviews with students before the deadline so that you can make your decision and make an offer/offers to students.
If this is Phase 1, you can wait until Phase 2 to engage with students. Please note: many students will be matched in Phase 1 so there will be less students available in Phase 2. Additionally, APPEL cannot guarantee that the same students who sent their CVs to you in Phase 1 will be available in Phase 2.
If this is Phase 2, you can contact APPEL to let them know that you would be interested in meeting any students who are not matched at the end of the process.