In a large mixing bowl, stir together the lemon juice, sugar and fish sauce until the sugar is dissolved. Add the cabbage, onion, carrot, mint, cilantro and oil. Toss the salad well.
Shrimp
Marinate the shrimp with cilantro, lime juice and olive oil for no more than 30 minutes. Grill shrimp one minute per side or until pink and the shrimp have curled. Serve with cabbage salad.