Dieses Ökonomieproblem wurde dem Präsidenten zur Kenntnis gelangt.
Dem Präsident hat das Ökonomieproblem zur Kenntnis gebracht.
What is the difference between the two phrases? Can they be interchangeable?
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I'll just focus on the two verbs in this answer.
"Gelangen" means "to reach" or to "make it to a place" and you can only do it. You cannot do it to someone.
Also, Kenntnis isn't used in combination with "gelangen" simply because people chose not to (no deeper reason). But you can attain it.
"Gelangen" works with "Erkenntnis" which means "Insight"
So... "Erkenntnis" is something you can go to in an abstract sense, and that works for "bringen" too
With "Kenntnis" it is different again. It can mean knowledge you acquire but also the entirety of the knowledge you already have... kind of.
And then there is also this phrasing
So... these phrasings work but you cannot exchange parts because they are all fixed idioms that people have grown accustomed to.
First of all both sentences unfortunately are incorrect. In addition to that they are not of a very high style.
This Version for example is correct. However, Kenntnis refers to knowledge. You would rather use Erkenntnis (insight) here because I assume that the president got an insight to an economical process due to the problem. That just as an example.
Furthermore there are different things to consider.
This would mean that the President is informed about the problem. He HAS "Kenntnis".
Someone informed the president and gave him insights concerning the problem.
You see that the way you use different verbs in this case can completely change the meaning. However, if you want to say that the president got insights about a certain problem you now have a few examples.
Hope that helps.