Perhaps you should try some spelling variations:
multifaceted research » multifaceted resource, multilevel research
vaccine research » medicine research
_ multifaceted » a multifaceted, _ multifactor, multi faceted
multi vaccine » anti vaccine, multiple vaccines
july 2009 » july 2008, july 2007, july 2019
july 2012 » 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 vaccine research : july 2009 ) or ( _ multifaceted research : july 2012 ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( multi vaccine research : july 2009 ) OR ( _ multifaceted research : july 2012 )).
• Adding a wildcard symbol may retrieve word variants: (( multi vaccine research : july 2009 ) or ( _ multifaceted research : july 2012 ))*.