"deep heart" is a correctly formed phrase and can be used in written English.
For example, you could use it in a sentence like this: "She held a deep heart full of sorrow for those who had suffered."
Modern Chinese cities don't have memories, but in their deep heart they need memories.
He was a brilliant student with a wry wit and a deep heart.
It was crystallized from a liquid magma, hot and invasive, within the deep heart of the former chain.
Sue: No matter what age, what gender, everybody feels a deep heart and groin yearning for Mary.
I am sure they are blessing in their deep heart what I'm doing to discover the truth".
Can we tell something about the deep heart of Gordon Brown from his love of Lewis Grassic Gibbon?
The reason these people were the happiest, the duo theorize, is that happiness doesn't come only from having deep, heart-to-heart talks.
In their deep hearts, I fear the right-wing pack leaders are hoping for it.
I spent some long, deep time in thoughtful fact-looking and deep heart-knowing.
Being non-local means that, once I have a deep heart-to-heart connection with the other, I can feel the impact of this relationship and its real-time changes regardless of our spatial proximity.
Like when I listen to or watch something I get that deep heart-wrenching feeling sometimes; the kind of feeling where your eyes are blank because your eyeballs are nesting in that specific memory.
