Perhaps you should try some spelling variations:
"multi option research : july 2007" » "multi opinion research : july 2007", "multi action research : july 2007", "multi optics research : july 2007", "multi location research : july 2007", "multi population research : july 2007", "multi ratios research : july 2007", "multi option research : july 2008", "multi option research : july 2013", "multi option 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.

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