01 - Combine ground pork, shrimp, glass noodles, wood ear mushrooms, carrot, garlic, green onions, egg, fish sauce, and black pepper in a large bowl. Mix thoroughly until all ingredients are evenly distributed and the mixture becomes sticky and cohesive.
02 - Fill a large shallow dish with warm water. Briefly dip each rice paper wrapper for approximately 5 seconds until pliable, then lay flat on a damp cloth to prevent drying out. Work with one wrapper at a time while keeping others moist.
03 - Place 2 tablespoons of filling near the bottom third of the softened wrapper. Fold both sides inward toward the center, then roll tightly from the bottom up, creating a compact cylinder. Seal the edge with a dab of water. Repeat with remaining filling and wrappers.
04 - Heat vegetable oil in a deep pan to a depth of 1 inch, maintaining temperature at 340°F. Fry spring rolls in batches for 5 to 7 minutes, turning occasionally until golden brown and crispy throughout. Transfer to paper towels to drain excess oil.
05 - Cook rice vermicelli noodles according to package directions until tender but still slightly firm. Drain thoroughly and rinse under cold running water to stop cooking and prevent sticking. Shake off excess water well.
06 - Dissolve sugar in warm water, then stir in fish sauce, lime juice, minced garlic, sliced chili, and shredded carrot if using. Mix well until sugar is completely dissolved. Adjust flavors to balance sweet, sour, and salty notes.
07 - Divide cooked noodles evenly among 4 serving bowls. Arrange lettuce, cucumber, bean sprouts, and fresh herbs on top. Slice spring rolls diagonally into pieces and place 3 rolls per bowl. Garnish with chopped roasted peanuts.
08 - Serve immediately with nuoc cham sauce on the side for dipping, or drizzle directly over the bowl. Offer extra herbs and lime wedges for guests to customize their bowls.