If you already have fire and ice arrows then you must already have the bow so it seems that you're looking for a place to get ammo for your bow, not the bow itself. In that case, you should be able to easily find them by cutting grass but if that's not working out for you, you can buy some at certain Beedle Ship Shops.
You could go to Fairy fountains to expand your quiver, which also fills it.
- If you go to a fairy fountain, you can either get a bigger: Bomb Bag(Max-99), Quiver(Max-99), Wallet(5000)
- Stick to the story, enemies are bound to give you arrows