Perhaps you should try some spelling variations:
"media vaccine research : july 2009" » "media medicine research : july 2009", "media vaccine research : july 2008", "media vaccine research : july 2007", "media vaccine research : july 2019"
"deep educational research : july 2009" » "der educational research : july 2009", "re educational research : july 2009", "data educational research : july 2009", "deep educational research : july 2008", "deep educational research : july 2007", "deep educational research : july 2019"

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

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