I ask the moderators to provide me a way to undo some of votes, so that I can change them. Should I list them here? Else, what should I do?
Moderators can't undo votes either, nor provide you with a way to do so. Like people said in the comments, and like you seem to have discovered too, if you can edit the posts to improve them, do so, and you can correct your vote afterwards. Perhaps some have already been edited since you voted on them?
Listing the posts here won't help. You only have 81 downvotes for all time on your Stack Overflow profile, and if only some of those were 'wrong', I would say it's not a huge problem.
What you should do is try and see what you can fix by editing posts, and be more careful with your votes from now on.
Technically, you could flag your posts for moderator attention and request them to escalate this to the community management team, but I doubt people would be happy if everyone started doing that for every vote they'd later want to reverse. I'm willing to bet such a flag would be declined by the moderators. So I'm going to recommend against doing that, and instead say you just have to live with the consequences of your actions and learn your lesson.