"thorough down" is not a correct or commonly used phrase in written English.
It is possible that the phrase was intended to mean "thoroughly down" or "completely down," but it would be more clear and grammatically correct to use these phrases instead. Example: "He searched the entire house thoroughly, down to the last corner." or "The team was completely down after losing the game."
According to him, it should be innovative and useful, aesthetic and honest, unobtrusive and long-lasting; it must make a product understandable, be thorough down to the last detail, and it must be concerned with the environment.
"Modern" is just such a label, we seek to create design that at its best is honest, long-lasting, understandable and thorough down to the last detail.
They are ruthlessly thorough, mowing down whatever cover the young trees might promise.
After a thorough hosing down, the boats still smelled of disinfectant, and a few fish scales clung to the aluminum structures in their bows.
Hugh Fearnley-Whittingsetll set out to give that duvet a thorough shaking down in the three-part Scandimania, or, as he put it, to crack the "Norse code".
It's a deep, thorough, breaking down of everything we know.
After removing the rust and sanding the surface, be sure to give a thorough wipe down to the metal with a damp cloth.
A thorough wipe-down with attention paid to the area around the bottom bracket and lower headset bearing is a good place to start.
— Nicole Perlroth Aereo Hands-On: Watch Broadcast TV Wherever and Whenever You Want GIZMODO.COM | A thorough run-down of the brand-new, Diller-backed cloud-based TV service.
A bunch of keys in my pocket sets off the alarm and I have forgotten to remove a laptop from my backpack before putting it on the conveyor belt, resulting in a thorough shake-down.
"If they do opt out, we just want to make sure, for example, on Christmas Day," Mr. Pistole said, in a clear reference to the underwear bomber, that "they receive a thorough pat-down so they don't pose a risk to that plane".
