Perhaps you should try some spelling variations:
"multi accident research : july 2009" » "multi current research : july 2009", "multi recent research : july 2009", "multi vaccine research : july 2009", "multi client research : july 2009", "multi accident research : july 2008", "multi accident research : july 2007", "multi accident research : july 2019"
"scale options research : july 2013" » "scale actions research : july 2013", "scale optics research : july 2013", "scale operations research : july 2013", "share options research : july 2013", "care options research : july 2013", "case options research : july 2013"

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: (("multi accident research : july 2009") OR ("scale options research : july 2013"))~.
• Removing quotes may allow a broader search: (( multi accident research : july 2009 ) or ( scale options research : july 2013 ))~.
• Adding a wildcard symbol may retrieve word variants: (("multi accident research : july 2009") or ("scale options research : july 2013"))*.