Perhaps you should try some spelling variations:
"multi national research : july 2009" » "multi educational research : july 2009", "_ multinational research : july 2009", "multinationals _ research : july 2009", "_ multinationals research : july 2009", "multi national research : july 2006", "multi national research : july 2013", "multi national research : july 2012"
"anti vaccine research : july 2009" » "anti action research : july 2009", "aids vaccine research : july 2009", "new vaccine research : july 2009", "anti vaccine research : july 2006", "anti vaccine research : july 2013", "anti vaccine research : july 2012"

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