To make the peanut sauce, whisk together peanut butter, Nước Mắm, lime juice, brown sugar, chili garlic sauce and ginger in a small bowl.
Whisk in 2-3 tablespoons water until desired consistency is reached; set aside.
In a medium bowl, combine coconut milk, soy sauce, curry powder, turmeric, garlic, ginger, brown sugar and Nước Mắm.
In a gallon size Ziploc bag or large bowl, combine chicken and coconut milk mixture; marinate for at least 2 hours to overnight, turning the bag occasionally.
Drain the chicken from the marinade, discarding the marinade.
Preheat grill to medium high heat.
Thread chicken onto skewers. Brush with canola oil; season with salt and pepper, to taste.
Add skewers to grill, and cook, turning occasionally, until the chicken is completely cooked through, reaching an internal temperature of 165 degrees F, about 12-15 minutes.
Serve immediately with peanut sauce.
Notes
Brown sugar can be replaced by honey equally by up to 1 cup in a recipe. If more than 1 cup of brown sugar is required, you may need to add only 2/3 to 3/4 of honey per cup of sugar (i.e. if the recipe calls for 2 cups of brown sugar, use only 1 3/4 cups of honey).