Perhaps you should try some spelling variations:
"anti vaccine research : july 2008" » "anti medicine research : july 2008", "ant vaccine research : july 2008", "active vaccine research : july 2008", "aids vaccine research : july 2008", "anti vaccine research : july 2013", "anti vaccine research : july 2012", "anti vaccine research : july 2020"
"multi client research : july 2009" » "multi accident research : july 2009", "multi climate research : july 2009", "multi current research : july 2009", "multi agent research : july 2009", "multi plant research : july 2009", "multi client research : july 2007", "multi client research : july 2019", "multi client research : july 2006"

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 client research : july 2009") or ("anti vaccine research : july 2008"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("multi client research : july 2009") OR ("anti vaccine research : july 2008")).
• Removing quotes may allow a broader search: (( multi client research : july 2009 ) or ( anti vaccine research : july 2008 )).
• Adding a wildcard symbol may retrieve word variants: (("multi client research : july 2009") or ("anti vaccine research : july 2008"))*.