Cannot do site-wide search for macros used on pages

I often need to search my Confluence site, to see where a specific macro is used, or to find a specific use of a given macro. I used to be able to do that by enclosing my search in double quotes and entering the relevant bit of wiki markup.

For example:

• To search for all inclusion macros that include the page called "_QRG_Colour", I just entered the following text into the search box:
  "include:_QRG_Colour"
• To search for all inclusion macros, I entered "{include".
• To search for all children macros, I entered "{children"

This no longer works, or at least I can't find a way of making it work. Please restore the functionality or document a workaround. It is essential for maintaining technical documentation.

An alternative would be for Confluence to provide a cross-reference, maybe at space level, of where each macro is used.