"tangible results" is a perfectly correct and usable phrase in written English. You can use it to describe a situation in which a physical or visible change or outcome has been achieved. For example: "The hours of hard work paid off, and we saw tangible results when the project was completed.".
It has positive, tangible results".
"We've had direct tangible results.
Some tests have already produced tangible results.
There are more tangible results as well.
Their combined efforts bring tangible results.
It fills a need for tangible results".
Still, the program has produced tangible results.
When I feel like I can't trust my brain 100%, Ludwig really comes in handy. It makes me translate and proofread faster and my output more reliable.
Claudia Letizia
Head Translator and Proofreader @ organictranslations.eu