Slice pork chops in half horizontally to form 4 thin-cut chops. Pound to even thinness. In small bowl, mix together rice vinegar, mirin, fish sauce, olive oil, sugar and Thai chili garlic sauce. Combine 1/4 cup dressing with pork in a resealable bag; marinate 20 minutes.
Soak rice vermicelli noodles following pkg directions, 8 minutes. Drain and rinse.
Heat grill pan. Grill pork for 3 minutes, then flip and grill an additional 2 to 3 minutes. Remove to a cutting board and cut into thin strips. In large bowl, combine nappa cabbage, cilantro leaves, mint leaves and scallions with the noodles. Toss with remaining dressing and top with pork.