Perhaps you should try some spelling variations:
multinationals research » binational research, multinationals report
vaccine research » medicine research
_ multinationals » _ multinational, multinationals _
multi vaccine » anti vaccine, multiple vaccines
july 2008 » july 2012, july 2020, july 2015

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 2008 ) or ( _ multinationals research : july 2013 ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( multi vaccine research : july 2008 ) OR ( _ multinationals research : july 2013 )).
• Adding a wildcard symbol may retrieve word variants: (( multi vaccine research : july 2008 ) or ( _ multinationals research : july 2013 ))*.