Perhaps you should try some spelling variations:
"multi accident research : june 2011" » "multi current research : june 2011", "multi recent research : june 2011", "multi vaccine research : june 2011", "multi client research : june 2011", "multi accident research : june 2013", "multi accident research : june 2014", "multi accident research : june 2010"
"multi history research : july 2006" » "multi study research : july 2006", "baltic history research : july 2006", "multi storey research : july 2006", "mri history research : july 2006", "multi history research : july 2008", "multi history research : july 2007", "multi history research : july 2009"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"multi accident research : june 2011\") OR (\"multi history research : july 2006\"))~".
• Removing quotes may allow a broader search: (( multi accident research : june 2011 ) OR ( multi history research : july 2006 ))~.
• Adding a wildcard symbol may retrieve word variants: (("multi accident research : june 2011") OR ("multi history research : july 2006"))*.