In what way have they been examining Esau? They investigated his secrets.
How are the things of Esau searched out! how are his hidden things sought up!
How are the things of Esau [Edom] searched out! How are his hidden treasures sought out!
How are the things of Esau searched! how are his hidden treasures sought out!
How Esau has been looted, his treasures taken away!
How have they searched Esau, how have they sought out his hidden things?