First, run around the house and the enemies will respawn, for chips 2500.
Second, dont farm here (chap 7). Farm in chapter 9, more incentive chips and credit chips from the enemies there.
http://forum.gamevn.com/showpost.php?p=14792006
"Chỗ nhà hope nó rớt ít chip lắm, cày ở đó kiếm ít cp rồi đi theo story đến chap 9. Cày chỗ đó rớt nhiều chip hơn, bán kiếm tiền mà nâng vk."
In chapter 9 there is a hallway with 3 sets of enemies between you, and a back room that contains nothing but another save point. You have a save points at both ends of this hallway, and the enemies all respawn any time you enter or exit that room, or if you move forward around the corner to progress, but turn back right before getting to the enemy group of 2x Huntresses. They all drop credit chips (worth 500 gil) and incentive chips (worth 2500 gil) that you can sell over and over for components to upgrade your gear.
http://www.gamefaqs.com/ps3/928790-final-fantasy-xiii/faqs/59442