Perhaps you should try some spelling variations:
vaccine research » action research
client research » accident research, climate research, climatic research
multi vaccine » anti vaccine
multi client » multi plant, meet client
july 2012 » july 2013
july 2007 » 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 client research : july 2012 ) or ( multi vaccine research : july 2007 ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( multi client research : july 2012 ) OR ( multi vaccine research : july 2007 )).
• Adding a wildcard symbol may retrieve word variants: (( multi client research : july 2012 ) or ( multi vaccine research : july 2007 ))*.