* Go to Google Insights for Search http://www.google.com/insights/search/
* Enter your search term/s ( for example: term selected from Google Hot Trends for the day )
* Adjust your date range in the Google Insights for search to Last 7 days & Click Search button
* Scroll Down to the bottom of the insights results till you find the Rising Searches / Breakout Terms for the semantic variations of the root trending term/s
Hope this helps. All the best.
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