Perhaps you should try some spelling variations:
"multi action research : july 2019" » "multi national research : july 2019", "multi actor research : july 2019", "multi option research : july 2019", "multi location research : july 2019", "multi action research : july 2013", "multi action research : july 2012", "multi action research : july 2015"
"multi aspects research : july 2009" » "multi especes research : july 2009", "multi asset research : july 2009", "multi species research : july 2009", "multi aspects research : july 2008", "multi aspects research : july 2007", "multi aspects research : july 2006"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("multi action research : july 2019") or ("multi aspects research : july 2009"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("multi action research : july 2019") OR ("multi aspects research : july 2009")).
• Removing quotes may allow a broader search: (( multi action research : july 2019 ) or ( multi aspects research : july 2009 )).
• Adding a wildcard symbol may retrieve word variants: (("multi action research : july 2019") or ("multi aspects research : july 2009"))*.