Perhaps you should try some spelling variations:
national research » educational research
further research » future research
multi national » _ multinational, multinationals _, _ multinationals
multi further » multi partner
july 2006 » july 2013, july 2012, july 2011
july 2009 » july 2013, july 2012, july 2011

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

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