Bread and butter /Bánh mì và bơ
/ˈˌbred (ə)n ˈbədər/
noun: bread and butter
a person’s livelihood or main source of income, typically as earned by routine work.
“their bread and butter is reporting local events”
an everyday or ordinary person or thing.
“the bread and butter of non-League soccer”
1. bánh mì và bơ