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 2015
july 2008 » july 2013, july 2012, july 2015
july 2020 » july 2013, july 2012

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) OR (july 2020)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( multi media research : july 2007 ) OR ( multi factors research : ((july 2008) OR (july 2020)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( multi media research : july 2007 ) or ( multi factors research : ((july 2008) OR (july 2020)) ))".
• Adding a wildcard symbol may retrieve word variants: (( multi media research : july 2007 ) or ( multi factors research : ((july 2008) OR (july 2020)) ))*.