Perhaps you should try some spelling variations:
accident research » current research, recent research, vaccine research
options research » actions research, optics research, operations research
multi accident » multi client
scale options » share options, care options, case options
june 2011 » june 2013, june 2014, june 2010
july 2009 » july 2008, july 2007, july 2019

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 ( scale options research : july 2009 ))~".
• Adding a wildcard symbol may retrieve word variants: (( multi accident research : june 2011 ) OR ( scale options research : july 2009 ))*.