When looking for ways of improving the ways my students search for information I came across ‘Wonder wheel’ which is part of Google search facilities.
Described as a way of simplifying and arranging search results, when selected, it creates something with the look of a mind-map as it links related searches. To the right of the screen, the list of web pages reflect the current selection.
I found it useful when exploring possible approaches to topics, and it sometimes threw up interesting avenues to investigate.
Find it to the bottom left of the Google page under ‘More Research Tools’.