Happy Life :) Literally translated from french, it means "Life in Pink"
It means "life in pink" or "the life in pink" just as "Cuộc sống màu hồng" does. As far as metaphorical meaning, it's like life through pink lenses being a life of bliss or ecstasy. I assumed the question was what does it mean as in what is the phrase a reference to because there seemed to be confusion about why a French phrase was the translation instead of English and it's a big part of early-20th century pop culture.
I think it's where we get the expression Looking through rose tinted glasses from. It sounds far better in French and Vn, but the meaning is pretty similar. When you look at something in exceptionally positive light, not necessarily based on reality.
"pink life" was accepted. I thought maybe it was the sequel to Poe's "Red Death".