Yes, this structure can be used to talk about the possibility that something happened in the past.
For example, you can say 'Expector may/might/could have missed my blog.' (You're not certain whether it was actually the case, though.)
'Could have' can also be used to say there was a possibility of something happening in the past, but it didn't happen. For example, 'I could have been killed.' (But in fact you weren't killed.)
It's such a useful structure - let's try to create a blog to practice it.


