Perhaps you should try some spelling variations:
vaccine research » medicine research
action research » national research
meet action » meets action, meet section, reset action
new vaccine » novel vaccine, anti vaccine
july 2009 » july 2008, july 2007, july 2006
july 2019 » july 2013, july 2015, july 2020
july 2012 » 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 action research : ((july 2009) OR (july 2019)) ) or ( new vaccine research : july 2012 ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( meet action research : ((july 2009) OR (july 2019)) ) OR ( new vaccine research : july 2012 )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( meet action research : ((july 2009) OR (july 2019)) ) or ( new vaccine research : july 2012 ))".
• Adding a wildcard symbol may retrieve word variants: (( meet action research : ((july 2009) OR (july 2019)) ) or ( new vaccine research : july 2012 ))*.