1. Put cilantro, sprouts, cucumber, onion, and celery in a large bowl. In a small bowl, mix together fish sauce, chili sauce, and lime juice to make dressing. Set both aside.
2. Heat oil in a large frying pan over high heat. Add beef and cook, stirring occasionally, until no longer pink, about 4 minutes. Drizzle beef with soy sauce. Add beef to vegetable mixture, pour dressing over salad, and toss gently to combine.
*Find in grocery stores' Asian foods aisle.