Perhaps you should try some spelling variations:
action research » national research
multi action » multi actor, multi option, multi location
july 2009 » july 2007, july 2019, july 2006
july 2011 » july 2013, july 2015, july 2019
july 2008 » july 2013, july 2020, july 2015
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: multi action research : ((((((july 2009) or (july 2011))) or (july 2008))) or (july 2012))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: multi action research : ((((((july 2009) OR (july 2011))) OR (july 2008))) OR (july 2012)).
• Adding a wildcard symbol may retrieve word variants: multi action research : ((((((july 2009) or (july 2011))) or (july 2008))) or (july 2012))*.