Perhaps you should try some spelling variations:
factors research » sector research, doctoral research, crops research
media research » medical research, iea research
multi factors » multi factor, multi actors, multi actor
multi media » _ multimedia, multimedia _
july 2007 » july 2013, july 2012, july 2020
july 2008 » july 2013, july 2012, 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 media research : july 2007 ) or ( multi factors research : july 2008 ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( multi media research : july 2007 ) OR ( multi factors research : july 2008 )).
• Adding a wildcard symbol may retrieve word variants: (( multi media research : july 2007 ) or ( multi factors research : july 2008 ))*.