Spray 5-quart slow cooker with cooking spray. In large resealable food-storage plastic bag, place chicken, coriander, paprika, salt and red pepper. Seal bag; shake to coat chicken with spices. In 12-inch skillet, heat oil over medium-high heat. Add half of the chicken; cook 5 minutes, turning once, until lightly browned. Remove chicken to slow cooker. Repeat with remaining chicken.