Perhaps you should try some spelling variations:
vaccine research » medicine research
action research » national research
meet vaccine » media vaccine, ant vaccine, mr vaccine
meets action » meets function, meets fashion, meet section
july 2009 » july 2008, july 2007, july 2019
july 2006 » july 2008, july 2007, july 2013

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( meet vaccine research : july 2009 ) or ( meets action research : july 2006 ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( meet vaccine research : july 2009 ) OR ( meets action research : july 2006 )).
• Adding a wildcard symbol may retrieve word variants: (( meet vaccine research : july 2009 ) or ( meets action research : july 2006 ))*.