Perhaps you should try some spelling variations:
action research » national research
multi action » multi actor, multi option, multi location
july 2009 » july 2008, july 2007, july 2019
july 2011 » july 2013, july 2015, july 2019
june 2011 » june 2013, june 2014, june 2010
july 2012 » july 2013

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: multi action research : ((july 2009) OR (((((july 2011) OR (june 2011))) OR (july 2012))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "multi action research : ((july 2009) or (((((july 2011) OR (june 2011))) or (july 2012))))~".
• Adding a wildcard symbol may retrieve word variants: multi action research : ((july 2009) or (((((july 2011) OR (june 2011))) or (july 2012))))*.