Perhaps you should try some spelling variations:
"quality education research : july 2007" » "quality educational research : july 2007", "quality population research : july 2007", "quality action research : july 2007", "quality education research : july 2008", "quality education research : july 2013", "quality education research : july 2020"
"multi climatic research : july 2012" » "multi climate research : july 2012", "multi climatic research : july 2013"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("multi climatic research : july 2012") OR ("quality education research : july 2007"))~.
• Removing quotes may allow a broader search: (( multi climatic research : july 2012 ) or ( quality education research : july 2007 ))~.
• Adding a wildcard symbol may retrieve word variants: (("multi climatic research : july 2012") or ("quality education research : july 2007"))*.