Perhaps you should try some spelling variations:
rapid responders » rapid responses, rapid response, rare responders
search rapid » research rapid, search rapidly, search api
health rapid » health api, health grapes, health lipids
death rapid » death repair

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: (( search rapid responders depot: summary with critical appraisal ) OR ( ((death rapid) OR (health rapid)) responses report: summary with critical appraisal )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( search rapid responders depot: summary with critical appraisal ) or ( ((death rapid) OR (health rapid)) responses report: summary with critical appraisal ))".
• Adding a wildcard symbol may retrieve word variants: (( search rapid responders depot: summary with critical appraisal ) or ( ((death rapid) OR (health rapid)) responses report: summary with critical appraisal ))*.