Perhaps you should try some spelling variations:
"multi educational research : july 2013" » "maxi educational research : july 2013", "multi generational research : july 2013", "multi national research : july 2013"
"early climate research : july 2019" » "daily climate research : july 2019", "energy climate research : july 2019", "family climate research : july 2019", "early climate research : july 2012", "early climate research : july 2015", "early climate research : 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 educational research : july 2013") or ("early climate research : july 2019"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("multi educational research : july 2013") OR ("early climate research : july 2019")).
• Removing quotes may allow a broader search: (( multi educational research : july 2013 ) or ( early climate research : july 2019 )).
• Adding a wildcard symbol may retrieve word variants: (("multi educational research : july 2013") or ("early climate research : july 2019"))*.