“I need a job. I can make gourmet Vietnamese coffee — with cardamom and egg cream.” Max: “We use instant coffee and condensed milk, sweetheart. This isn’t Đà Lạt.”
After a failed attempt to wash dishes (Linh breaks three bowls), the owner hires her for minimum wage. Max reluctantly lets Linh sleep on her broken sofa.
It sounds like you're looking for a for 2 Broke Girls Season 1, but transformed into a solid, original narrative.