Perhaps you should try some spelling variations:
"rl actions research : july 2006" » "rl action research : july 2006", "rl actional research : july 2006", "rl actors research : july 2006", "re actions research : july 2006", "2 actions research : july 2006", "3 actions research : july 2006", "rl actions research : july 2008", "rl actions research : july 2007", "rl actions research : july 2009"
"multi factor research : july 2011" » "multi factors research : july 2011", "multi sector research : july 2011", "multi actors research : july 2011", "multi actor research : july 2011", "_ multifactor research : july 2011", "multi factor research : july 2013", "multi factor research : july 2012", "multi factor research : 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")).
• Removing quotes may allow a broader search: (( 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"))*.