Something (or other), Some kind of
Structure:
何（なに）やら + Phrase
Right after the example sentence,
“洗濯やら何やらをしない奴は文句言うな！”
is the little break that says, when talking about the difference between it and 何か,
“… 何やら is only used when the speaker is unsure of what the thing in question is.”
That doesn’t seem to track with the example sentence directly before it (quoted above). It’s not that the person is “unsure” of the thing in question, like, “laundry and I’m unsure of what else.” right? When it’s Aやら何やら, it’s more like “A and things like A.” But they’re definitely sure about what “things like A” entails, or am I missing something?