Perhaps you should try some spelling variations:
location research » locations research, education research, action research
actors research » factors research, actions research, author's research
multi location » multi option, multiple locations, multiplication _
rl actors » all actors, rl actions, _ actors
july 2009 » july 2008, july 2007, july 2019
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 actors research : july 2009 ) or ( multi location research : july 2011 ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( rl actors research : july 2009 ) OR ( multi location research : july 2011 )).
• Adding a wildcard symbol may retrieve word variants: (( rl actors research : july 2009 ) or ( multi location research : july 2011 ))*.