It sounds to me that you're doing everything and all that is physically possible to manage anemia. Leafy green veggies also helpful, esp. broccoli kale and spinach. Make sure you eat Vit C products with them tho., e.g., spinach salad with mandarin oranges or strawberries.
Anemia that cannot be controlled by supplements or diet is related to the effects of chemo on bone marrow, which produces red blood cells.
Hope this helps