Perhaps you should try some spelling variations:
rapid responders » rapid responses, rare responders, said respondents
response report » response depot, response reporting, response support
death rapid » health rapid, death repair, search rapid

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((( death rapid ((response report) OR (responses report)): summary with critical appraisal ) OR ( death rapid responders depot: summary with critical appraisal ))) OR ( death rapid response depth: summary with critical appraisal )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( death rapid ((response report) OR (responses report)): summary with critical appraisal ) or ( death rapid responders depot: summary with critical appraisal ))) or ( death rapid response depth: summary with critical appraisal ))".
• Adding a wildcard symbol may retrieve word variants: (((( death rapid ((response report) OR (responses report)): summary with critical appraisal ) or ( death rapid responders depot: summary with critical appraisal ))) or ( death rapid response depth: summary with critical appraisal ))*.