Perhaps you should try some spelling variations:
"multi client research : july 2012" » "multi accident research : july 2012", "multi current research : july 2012", "multi recent research : july 2012", "multi agent research : july 2012", "multi plant research : july 2012", "multi client research : july 2013"
"arid climate research : july 2007" » "arid climate research : july 2008", "arid climate research : july 2013", "arid climate research : july 2020", "aid climate research : july 2007", "grid climate research : july 2007", "acid climate research : july 2007"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"multi client research : july 2012\") OR (\"arid climate research : july 2007\"))~".
• Removing quotes may allow a broader search: (( multi client research : july 2012 ) OR ( arid climate research : july 2007 ))~.
• Adding a wildcard symbol may retrieve word variants: (("multi client research : july 2012") OR ("arid climate research : july 2007"))*.