Ok, i found something. I used Expired Article Hunter and found a nice article.
I copied it in free plagiarism checkers online. All told the content was safe. So i uploaded it in a blog post on wordpress.
Suddenly some letters were just quite different.
So what i did was i retyped everything by myself.
After that i did another plagiarism check, and guess what now my article plagiarism..
Copyscape is not accurate. There are some free tools working better than copyscape. In fact, i find it is the worst plagiarism checker, i have use