1. Rinse the jasmine rice under cold water until the water runs clear.
2. In a large pot, bring the chicken broth to a boil.
3. Add the rinsed rice, fish sauce, soy sauce, salt, white pepper, garlic, and ginger to the pot.
4. Reduce the heat to low and let it simmer for about 20 minutes, stirring occasionally.
5. Add the chicken thighs to the pot and continue to simmer for another 10 minutes or until the chicken is cooked through.
6. Remove the chicken thighs, shred them, and return the shredded chicken to the pot.
7. Serve the porridge hot, garnished with chopped cilantro and green onions.