what a good piece of advice 还是what a piece of good advice

在英国和美国语料库里都没有搜到a good piece of news,但都搜到a piece of good news,如：
OK.Well,there's got to be a piece of good news here,and that is that you're alive.
在reference.com上搜的结果是a good piece of news/ a piece of good news是555/ 2250.
类似的,应该是what a piece of good advice