"behind the surface" is correct and usable in written English.
You can use it to describe something that is hidden or to suggest that there is something more than meets the eye. For example, "There was a lot of tension between them, but behind the surface they were actually good friends."
In case you are behind, the Surface Hub is a massive touch screen, built on the tech that Microsoft acquired by buying Perceptive Pixel (PPI).
Yet it points to a devastating truth behind the surface.
I started to grow more curious about the economic forces behind the surface realities of life.
Behind the surface tussling over symbols lies a fight for power and influence.
I sometimes get carried away with searching for presences, visitations, the idea that a haunted space coexists behind the surface.
The movement has also been marked by political infighting, a trades union split, and personal rivalries behind the surface unity.
He goes to a place of concentrated and focussed activity — a hospital, a school, a public-assistance office, a business, a university, even (as in his most recent film, "In Jackson Heights," one of his best) an entire neighborhood — and manages to reveal the abstractions, the rules and the exercise and negotiation of power, behind the surfaces of daily life.
It removes stubs of proteins left behind on the surface of nerve cells and is needed to make other proteins, so completely blocking it would be problematic.
But until now, Mortgage Resolution Partners behind-the-scenes role had not surfaced.
These leave behind scars on the surface of the twig.
This means that although the services remain distinct on the surface, behind the scenes their individual pipes feed into the same massive user-data reservoir.
