Perhaps you should try some spelling variations:
"meet vaccine research : july 2007" » "meet medicine research : july 2007", "media vaccine research : july 2007", "ant vaccine research : july 2007", "mr vaccine research : july 2007", "meet vaccine research : july 2008", "meet vaccine research : july 2013", "meet vaccine research : july 2012"
"mali climate research : july 2007" » "bali climate research : july 2007", "daily climate research : july 2007", "early climate research : july 2007", "mali climate research : july 2008", "mali climate research : july 2013", "mali climate research : july 2012"

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

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