Perhaps you should try some spelling variations:
"anti vaccine research : july 2009" » "anti medicine research : july 2009", "ant vaccine research : july 2009", "active vaccine research : july 2009", "aids vaccine research : july 2009", "anti vaccine research : july 2008", "anti vaccine research : july 2007", "anti vaccine research : july 2006"
"meet climate research : july 2019" » "best climate research : july 2019", "deep climate research : july 2019", "heat climate research : july 2019", "meet climate research : july 2013", "meet climate research : july 2012", "meet climate research : july 2015"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("anti vaccine research : july 2009") OR ("meet climate research : july 2019"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"anti vaccine research : july 2009\") OR (\"meet climate research : july 2019\"))".
• Removing quotes may allow a broader search: (( anti vaccine research : july 2009 ) OR ( meet climate research : july 2019 )).
• Adding a wildcard symbol may retrieve word variants: (("anti vaccine research : july 2009") OR ("meet climate research : july 2019"))*.