To be honest, I don't know for sure. Sometimes it might be feasible, but it often depends on the rights and regulations associated with that particular manhwa. You might want to look into the terms and conditions provided when you got it.
Well, usually it's possible, but it might involve certain conditions. For example, if it's a subscription-based service and you haven't violated any terms, you might be able to. But if it's a one-time purchase or has specific usage rules, it could be more complicated.
Taking back Manhwa Chapter 65 is unlikely to be possible. Usually, once a chapter is made available, it's there for viewing and can't be reversed. But you could explore if there are any special circumstances or options mentioned by the publisher or platform.
It depends on the specific terms and conditions set by the source or platform where you accessed it. Sometimes, you might have the option to re-read it, but not necessarily take it back in a literal sense.