Perhaps you should try some spelling variations:
"multi educational research : july 2009" » "quality educational research : july 2009", "wealth educational research : july 2009", "low educational research : july 2009", "multi educational research : july 2006", "multi educational research : july 2013", "multi educational research : july 2011"
"multi vaccine research : july 2012" » "multi action research : july 2012", "anti vaccine research : july 2012", "multi vaccine research : july 2013"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("multi vaccine research : july 2012") OR ("multi educational research : july 2009"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"multi vaccine research : july 2012\") OR (\"multi educational research : july 2009\"))*".
• Removing quotes may allow a broader search: (( multi vaccine research : july 2012 ) OR ( multi educational research : july 2009 ))*.