Perhaps you should try some spelling variations:
accident research » current research, recent research, vaccine research
multi accident » multi client
july 2012 » july 2013
july 2006 » july 2007, july 2009, july 2013
july 2008 » july 2013, july 2020, july 2015
june 2014 » june 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 accident research : ((july 2012) or (((((july 2006) OR (july 2008))) or (june 2014))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: multi accident research : ((july 2012) OR (((((july 2006) OR (july 2008))) OR (june 2014)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "multi accident research : ((july 2012) or (((((july 2006) OR (july 2008))) or (june 2014))))".
• Adding a wildcard symbol may retrieve word variants: multi accident research : ((july 2012) or (((((july 2006) OR (july 2008))) or (june 2014))))*.