HEAT oven to 400°F.
CUT 2 tortillas into strips; toss with 1/2 tsp. oil. Spread in single layer on baking sheet. Bake 10 to 12 min. or until crisp, stirring occasionally.
MEANWHILE, finely chop remaining tortillas. Heat remaining oil in large saucepan on medium-high heat. Add chicken; cook and stir 5 min. Add chopped tortillas, broth, salsa and corn. Bring to boil; simmer on medium-low heat 15 min.
SERVE topped with cheese and tortilla strips.