Perhaps you should try some spelling variations:
"multi educational research : july 2011" » "quality educational research : july 2011", "wealth educational research : july 2011", "low educational research : july 2011", "multi educational research : july 2012", "multi educational research : june 2011"
"multi factor research : july 2013" » "multi sector research : july 2013", "multi action research : july 2013", "multi water research : july 2013", "_ multifactor research : july 2013", "multi faceted research : 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 factor research : july 2013") OR ("multi educational research : july 2011"))~.
• Removing quotes may allow a broader search: (( multi factor research : july 2013 ) or ( multi educational research : july 2011 ))~.
• Adding a wildcard symbol may retrieve word variants: (("multi factor research : july 2013") or ("multi educational research : july 2011"))*.