Heat olive oil in a large saucepan over medium heat. Add chopped onions and cook until softened, about 4 minutes. Stir in garlic, chili powder, cumin and oregano and cook for 1 minute. Add diced tomatoes, tomato soup, bouillon cubes, salsa, shredded turkey, parsley, corn, black beans, water and bouillon. Bring to a boil, then reduce heat and simmer for 20 to 30 minutes. Simmer until cheese and sour cream dissolve. Serve hot with crushed tortilla chips, shredded cheese and chopped cilantro if desired.