"Why do you write about these things?"

Translation: Чому ви пишете про ці речі?

[RuinGuardian]

Is справи not correct in this context?

[skstudio]

I would say it would be less general. "Реч" can be anything and "справа" is more like some situation or process.

[AlejoWozni]

Doesn't "чого" mean "why"?