The sentence "has made some contribution" is correct and usable in written English.
You can use it to describe an action taken by someone (a person or group) that had a positive effect. For example: "John's volunteer work with the local homeless shelter has made some contribution to the community."
Strong drew an analogy with Christ's miraculous conversion of water into wine: "The wine in the miracle was not water because water had been used in the making of it, nor is man a brute because the brute has made some contributions to its creation".
For the final 50 we tried to get a mix of things – recordings, meetings of minds, technological breakthroughs, gigs – that have made some contribution to where we find rock today.
I hope I've made some contribution to the success, but there's nothing better than having a great team around you.
But if the job is not being done – if there is more that research could do to save others – the mere fact of having made some contribution does not absolve you of the responsibility to make a further contribution.
And so I said that in America we're all bees, and we're all after our honey, and inadvertently our little tails knock off quite a lot of pollen, and inadvertently we've made some contributions.
And today, as we look throughout this auditorium at our fellow colleagues from the Andromeda Galaxy and the Pleiades, we can feel a sense of real accomplishment that we Earthlings have made some contributions to homeopathy, even though they have utilized the homeopathic principle for centuries longer than we have.
"I have enormous respect for Ina as a professional and as a person; she has made some incredible contributions to this company".
A third school of thought points to investment in ideas and new technologies that outlast their inventors (the economist Paul Romer has made some major contributions here).
If you compare people's lives in the West today with those of people living, say, a century ago, or two centuries ago, it would be right, if perhaps a little miserly, to concede that business has made some "significant contributions".
"He hasn't picked up many five-wicket hauls but he has made some serious contributions to the England team doing well and [Monday] was an excellent example," the team director, Andy Flower, said.
