In a large bowl, whisk together fish sauce, vegetable oil, lime juice, palm sugar, and turmeric, until sugar is dissolved.
Add chicken pieces with lemongrass and ginger to the marinade and mix well to coat evenly.
Allow to marinate in the fridge for at least one hour and preferably overnight.
Remove chicken pieces from marinade and thread chicken onto wooden skewers. Cook on a grill, on a grill pan, or under a broiler over medium heat until chicken is cooked through, about 4 minutes on each side.
Transfer to a serving platter and serve hot with peanut sauce and sliced cucumbers.