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 2013", "meet vaccine research : july 2012", "meet vaccine research : july 2020"
"bali climate research : july 2008" » "mali climate research : july 2008", "daily climate research : july 2008", "early climate research : july 2008", "bali climate research : july 2013", "bali climate research : july 2012", "bali climate research : july 2020"

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: (("meet vaccine research : july 2007") or ("bali climate research : july 2008"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("meet vaccine research : july 2007") OR ("bali climate research : july 2008")).
• Removing quotes may allow a broader search: (( meet vaccine research : july 2007 ) or ( bali climate research : july 2008 )).
• Adding a wildcard symbol may retrieve word variants: (("meet vaccine research : july 2007") or ("bali climate research : july 2008"))*.