Perhaps you should try some spelling variations:
multinationals research » binational research, multinationals report
mutation operations » mutation operators, aviation operations, sanitation operations
_ multinationals » _ multinational, multinationals _
july 2006 » july 2008, july 2007, july 2013
july 2009 » july 2008, july 2007, july 2019

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( mutation operations research : july 2006 ) or ( _ multinationals research : july 2009 ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( mutation operations research : july 2006 ) OR ( _ multinationals research : july 2009 )).
• Adding a wildcard symbol may retrieve word variants: (( mutation operations research : july 2006 ) or ( _ multinationals research : july 2009 ))*.