A couple of something vs A couple of more something

[trungtran]

I have been learning about the expression “a couple of something” but I have noticed that people also use these two expression “a couple of more something” and “a couple more something” or even “a couple something”. So I wonder if all of these four expression have the same meaning or the word “more” in this context means “another two of something” or “a few more something”.

[Alan]

'A couple more (people)' is in common use, but the other two are nonstandard at best. I have never heard the first from any native speaker.