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 2019"
"multi action research : july 2009" » "multi national research : july 2009", "multi actor research : july 2009", "multi option research : july 2009", "multi location research : july 2009", "multi action research : july 2008", "multi action research : july 2007", "multi action research : july 2019"

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: (("anti vaccine research : july 2009") or ("multi action research : july 2009"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("anti vaccine research : july 2009") OR ("multi action research : july 2009")).
• Removing quotes may allow a broader search: (( anti vaccine research : july 2009 ) or ( multi action research : july 2009 )).
• Adding a wildcard symbol may retrieve word variants: (("anti vaccine research : july 2009") or ("multi action research : july 2009"))*.