This dictionary (https://jisho.org/search/%E5%AE%B6%E4%B8%AD%20%23sentences) gives the translation:
「失った物がないかと家中を捜した」
I searched all the rooms for the lost thing.
But I don't understand why it is not translated into "I searched all the rooms to see if there is something missing"
Could someone explain this please?