Perhaps you should try some spelling variations:
"meet vaccine research : july 2007" » "meet medicine research : july 2007", "media vaccine research : july 2007", "ant vaccine research : july 2007", "mr vaccine research : july 2007", "meet vaccine research : july 2013", "meet vaccine research : july 2012", "meet vaccine research : july 2020"
"mindset science research : july 2008" » "mindset resilience research : july 2008", "feminist science research : july 2008", "mindset oriented research : july 2008", "mindset science research : july 2013", "mindset science research : july 2012", "mindset science research : july 2020"

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: (("mindset science research : july 2008") OR ("meet vaccine research : july 2007"))~.
• Removing quotes may allow a broader search: (( mindset science research : july 2008 ) or ( meet vaccine research : july 2007 ))~.
• Adding a wildcard symbol may retrieve word variants: (("mindset science research : july 2008") or ("meet vaccine research : july 2007"))*.