Read, learn and copy the content. Paste the article you found in notepad and rewrite it. Don't just change a few words. Change every sentence. Change everything. Rewrite the whole article in your own words. - This requires effort and it takes time, so it doesn't work for people who tries to cut corners by using article spinners.
Copying content, even if you reword it entirely, is still cutting corners... because otherwise you'd need inspiration to write something, and by copying others you cut that particular corner.