I was asked once if multiple particles can be attached to the same word. The answer to that question? Absolutely! Some particles can double up, but some can’t (or at least don’t very commonly). Especially the plural particle -들 and the “only” particle -만 combine pretty productively with other particles. Here are some examples of particles stacking up:
학생들이 숙제를 냈어요. (The students turned in their homework.)
남자 친구는 저에게만 꽃을 줬어요. (My boyfriend give flowers only to me.)
배만으로 거기에 갈 수 있어요. (You can go there by boat only.)
수강신청은 내일 아침 10시까지만 가능해요. (Course registration is possible only until 10am tomorrow.)
You’ll find more combinations as you encounter more authentic material. They’re out there!