Perhaps you should try some spelling variations:
"multi climatic research : july 2007" » "multi climate research : july 2007", "multi climatic research : july 2013", "multi climatic research : july 2012"
"Multi vaccine research : July 2007" » "Multi action research : July 2007"
multi vaccine » anti vaccine

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 vaccine research : July 2007") or ("multi climatic research : july 2007"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("Multi vaccine research : July 2007") OR ("multi climatic research : july 2007")).
• Removing quotes may allow a broader search: (( Multi vaccine research : July 2007 ) or ( multi climatic research : july 2007 )).
• Adding a wildcard symbol may retrieve word variants: (("Multi vaccine research : July 2007") or ("multi climatic research : july 2007"))*.