Perhaps you should try some spelling variations:
control research » context research, cultural research, doctoral research
group research » groups research, crop research, growth research
multi control » multi controller, multi country, multi contact
multi group » multiple group
july 2012 » july 2013
july 2007 » july 2008, july 2013, july 2020

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( multi group research : july 2012 ) or ( multi control research : july 2007 ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( multi group research : july 2012 ) OR ( multi control research : july 2007 )).
• Adding a wildcard symbol may retrieve word variants: (( multi group research : july 2012 ) or ( multi control research : july 2007 ))*.