'happy combination' is a correct and usable phrase in written English.
You can use it when discussing positive relationships between two or more elements. For example: "The happy combination of fresh ingredients and traditional recipes make this restaurant's dishes delicious and unique."
It was a happy combination".
The U-boat problem was effectively solved by a happy combination of ingenuity and geography.
War heroes and books would seem to make for a straightforward and happy combination, though there are exceptions.
The Gae Foster Girls, o on the other hand, are a happy combination of dancer, acrobat, and trained animal.
On balance, therefore, the happy combination of low unemployment and subdued wage inflation looks set to continue.
With one anecdote, Burress summed up his relationship with Manning, the Giants' quarterback — somewhat disguised, a little mismatched, but a happy combination.
Healey won by a minuscule margin, but Foot and Healey, though a happier combination than Foot and Benn could have been, was always an odd kind of tandem when the two had so often pedalled in opposite directions, and on issues such as defence still did.
We trade bites of grilled pork tenderloin from a plate garnished with hoisin-braised short ribs, and comment on the unusual -- and happy -- combination of seared scallops and venison ravioli in clam broth with a touch of bacon and cream.
Almond milk and coffee sounds a happy flavour combination, but I return to my cup after polishing off avocado on toast and find it no longer resembles anything I want to put near my mouth.
McDonald's initiated a public announcement in 2013 when it took the soda option, such as Coke, Sprite and other sugary soft drinks, out of its kids' "Happy Meals" combinations.
Like many seasoned travelers, I'd been burned by the promise of rustic lodging with multi-star amenities, a happy-sounding combination that often meant a working telephone in a stone chamber otherwise untouched by progress and its attendant conveniences, like reliable plumbing and regular maid service.
