뭘 찾고

what ... looking for

→ 뭐+를
phrase Uncommon #6,958
what ... looking for 뭘 means “what,” and 찾고 means “looking for”; the phrase is commonly followed by 있어요 or another verb ending.
KO: 뭘 찾고 있어요?
EN: What are you looking for?

엄마가 사막에서 뭘 찾고 있게?

What do you think Mom is looking for in the desert?

— Wonderland (2024)

뭘 찾고 있나?

What are you looking for?

— 다이 하드 (1988)