In a medium bowl, combine e.v olive oil, lemon and orange juice, fish sauce, lemon and orange zest, salt and pepper, mix well. Add the chopped cucumbers, cilantro,parsley, avocado, dill, green onions, serrano/jalapeño, toss gently. Taste, and adjust the salt and freshly ground pepper as needed, keeping in mind fish sauce is salty. Set aside.