Perhaps you should try some spelling variations:
accident research » current research, recent research, vaccine research
medicine research » medical research, media research, vaccine research
meet accident » depth accident, meet client, post accident
new medicine » one medicine, novel medicine, tele medicine
july 2011 » july 2013, july 2012, july 2015
july 2006 » july 2008, july 2007, july 2009

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: (( new medicine research : july 2011 ) OR ( meet accident research : july 2006 ))~.
• Adding a wildcard symbol may retrieve word variants: (( new medicine research : july 2011 ) or ( meet accident research : july 2006 ))*.