I disagree with your conclusion that 4 alternative accounts are connected. In the future, I advise you to disassemble accounts more carefully so as not to expose the accounts of innocent people to an undeserved reputation.
 
Let's go in order.

3. phuongthao96

You found just one match on the social network https://facebook.com/cryptoreflector666
But why didn't you check the entire history of this account? He stole bounty reports from many accounts.

https://bitcointalk.org/index.php?action=profile;u=1862308;sa=showPosts
[ archive ]

This does not in any way connect him with Cryptoreflector_666

Next, the account
Does the same. It uses someone else's Telegram username data.
He has an alternate account. But here I have a little doubt, based on his behavior on the forum.

maruf01

[ archive ]

[ archive ]

I also found plagiarism on him.
https://bitcointalk.org/index.php?topic=1926895.msg55414171#msg55414171

Finally, an account Sendorl

Here you are right, it is an alternative account Cekerula. It also steals user data to register in the bounty.
It will be banned shortly.


Also, you have merged all 4 accounts together, how do the first two relate to the last?