Preheat an oven to 425ºF. Line a rimmed baking sheet with parchment paper.
Roast the chicken wings. In a large bowl, toss the wings with a little oil, salt, and pepper. Lay the wings on the baking sheet and roast for 20 minutes.
Char the aromatics. While the wings roast, heat a cast iron skillet over medium heat and add a little oil. Char the onion, cut side down, with the ginger until both are charred. Remove from the heat.
Simmer the broth for 1 hour. Add the wings, charred onion, charred ginger, cinnamon, anise, and coriander to a large stock pot. Add the chicken broth and water. Bring to a simmer over medium-low heat, skimming away any foam or scum that rises to the surface. Simmer at a gentle rolling boil for 1 hour.
Strain and season. After an hour, strain the broth through a mesh strainer into a smaller pot and return to the stove. Season to taste with fish sauce, sugar, and salt or msg. Keep the broth hot.