건 없어요

there's nothing

→ 것+은
phrase Rare #16,886
there's nothing 건 is a shortened form of 것은, meaning “as for the thing(s)”; the phrase often means “there's nothing to…” or “I didn't … anything,” depending on the preceding verb.
KO: 더 물어볼 건 없어요.
EN: There's nothing else to ask.

하지만 불법적 인 건 없어요

But there’s nothing illegal about it.

— 데이 워치 (2006)

네, 하지만 달라진 건 없어요

Yes, but nothing has changed.

— 로렌스 애니웨이 (2012)

고칠 건 없어요

There’s nothing to fix.

— 데드풀과 울버린 (2024)

가져간 건 없어요

I didn't take anything.

— 판의 미로: 오필리아와 세개의 열쇠 (2006)