Cut the lemongrass into 10 cm (4") segments. Smash the lemongrass and garlic cloves until they're partially split, then put them in a bowl with the drumsticks and giblets.
Marinate the drumsticks and giblets in tumeric powder.
Heat up a wok on high heat and add the cooking oil. Flash fry the taro until crispy on the outside then set aside.Note: This will help to develop a crispy crust around the taro which prevents it from breaking up in the curry. Flash fry the sweet potatoes until crispy on the outside in the same oil, then set aside.
Separate the lemongrass and garlic from the marinated drumsticks and giblets. Reuse the cooking oil (or replace with 3 tbsp new oil) to fry the lemongrass and garlic for 30 seconds.
Pour the drumsticks into the wok and cook for 5 minutes or enough to to sear all sides.
Meanwhile, bring the chicken and pork stock to a boil and add the curry sauce, coconut cream, condensed milk, chicken bouillon powder, salt and curry leaves.
Add the drumsticks, taro, sweet potatoes and onions in and cook on a medium simmer for 20 minutes.
Optional: While the everything's cooking, prepare and cook the blood jelly. When ready, add it into the curry pot.
While everything's cooking, bring a pot of water to a boil and cook the noodles for 10 minutes or until al dente. Drain and let it drip dry.
Serve your Cà Ri Gà with a squeeze of lime juice, fresh Vietnamese baguette and rice noodles!