Perhaps you should try some spelling variations:
"meet accident research : july 2006" » "meet current research : july 2006", "meet recent research : july 2006", "depth accident research : july 2006", "meet client research : july 2006", "post accident research : july 2006", "meet accident research : july 2008", "meet accident research : july 2007", "meet accident research : july 2009"
"anti vaccine research : july 2012" » "anti medicine research : july 2012", "ant vaccine research : july 2012", "active vaccine research : july 2012", "aids vaccine research : july 2012", "anti vaccine research : july 2013"

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 2012") OR ("meet accident research : july 2006"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"anti vaccine research : july 2012\") OR (\"meet accident research : july 2006\"))".
• Removing quotes may allow a broader search: (( anti vaccine research : july 2012 ) OR ( meet accident research : july 2006 )).
• Adding a wildcard symbol may retrieve word variants: (("anti vaccine research : july 2012") OR ("meet accident research : july 2006"))*.