Perhaps you should try some spelling variations:
"multi option research : july 2012" » "multi opinion research : july 2012", "multi action research : july 2012", "multi optics research : july 2012", "multi location research : july 2012", "multi population research : july 2012", "multi ratios research : july 2012", "multi option research : july 2013"
"mali climate research : july 2009" » "bali climate research : july 2009", "daily climate research : july 2009", "early climate research : july 2009", "mali climate research : july 2008", "mali climate research : july 2007", "mali climate research : july 2019"

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 option research : july 2012") OR ("mali climate research : july 2009"))~.
• Removing quotes may allow a broader search: (( multi option research : july 2012 ) or ( mali climate research : july 2009 ))~.
• Adding a wildcard symbol may retrieve word variants: (("multi option research : july 2012") or ("mali climate research : july 2009"))*.