Perhaps you should try some spelling variations:
actions research » action research, actional research, actors research
factor research » factors research, sector research, actors research
multi factor » multi actor, multi sector, _ multifactor
rl actions » re actions, 2 actions, 3 actions
july 2006 » july 2008, july 2007, july 2009
july 2011 » july 2013, july 2012, july 2015

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( rl actions research : july 2006 ) or ( multi factor research : july 2011 ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( rl actions research : july 2006 ) OR ( multi factor research : july 2011 )).
• Adding a wildcard symbol may retrieve word variants: (( rl actions research : july 2006 ) or ( multi factor research : july 2011 ))*.