In a small bowl, whisk together the oyster sauce, light soy sauce, dark soy sauce, fish sauce, sugar, and chicken broth until the sugar dissolves.
Heat vegetable oil in a wok or large cast-iron skillet over high heat until shimmering.
Add the minced garlic and sliced chilies; stir-fry for 30 seconds until fragrant, being careful not to burn the garlic.
Add the minced chicken to the wok, breaking it into small bits with a spatula, and cook until the meat is no longer pink (approximately 3-4 minutes).
Pour the sauce mixture over the chicken and stir-fry for another 1-2 minutes until the sauce reduces slightly and coats the meat.
Turn off the heat and immediately add the holy basil leaves, folding them into the chicken until just wilted by the residual heat.
Serve immediately over jasmine rice, traditionally accompanied by a crispy fried egg with a runny yolk.