Perhaps you should try some spelling variations:
"quality educational research : july 2009" » "quality education research : july 2009", "inequality educational research : july 2009", "elite educational research : july 2009", "quality educational research : july 2008", "quality educational research : july 2007", "quality educational research : july 2006"
"anti vaccine research : july 2019" » "anti medicine research : july 2019", "ant vaccine research : july 2019", "active vaccine research : july 2019", "aids vaccine research : july 2019", "anti vaccine research : july 2013", "anti vaccine research : july 2012", "anti vaccine research : july 2015"

Try widening your search to All Fields.

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

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