1. Heat oil in a Dutch oven over medium-high heat. Sprinkle chicken with 1/2 teaspoon salt and 1/4 teaspoon pepper. Add chicken, flesh side down. Cook 10 minutes; turn thighs after 5 minutes. Cool; shred. Discard bones.
2. Add onion and carrot to pan; sauté 10 minutes. Add garlic; sauté 1 minute. Place herb sprigs, ginger, serrano chile, and bay leaves on cheesecloth. Gather edges; tie securely. Add sachet to pan. Stir in curry powder; sauté 20 seconds.
3. Add chicken stock, water, and coconut milk to pan; bring to a boil. Return chicken to pan. Reduce heat to medium, and simmer 15 minutes or until vegetables are tender, stirring occasionally. Remove from heat; discard sachet. Combine yogurt, chopped fresh cilantro, lime rind, and fresh lime juice.