다 들어오다

come back in after doing something

"-다(가)" marks an action broken off, with 들어오다 "come in" after it. The signature pattern is 나갔다 들어오다, going out and coming back in: I just went out for medicine and came back, I'll step out for a bit, you have to spray disinfectant when you come back in. It also covers coming in from the middle of something else — you were just passing and walked in? if you come back in about half an hour; even when the owner comes home after ten hours' work.