Perhaps you should try some spelling variations:
"multiple options research : july 2007" » "multiple locations research : july 2007", "multiple positions research : july 2007", "multiple solutions research : july 2007", "multiple actions research : july 2007", "multiple optics research : july 2007", "multiple operations research : july 2007", "multiple options research : july 2008", "multiple options research : july 2013", "multiple options research : july 2012"
"multi action research : july 2009" » "multi national research : july 2009", "multi actor research : july 2009", "multi option research : july 2009", "multi location research : july 2009", "multi action research : july 2008", "multi action research : july 2019", "multi action research : july 2006"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("multiple options research : july 2007") or ("multi action research : july 2009"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("multiple options research : july 2007") OR ("multi action research : july 2009"))*.
• Removing quotes may allow a broader search: (( multiple options research : july 2007 ) or ( multi action research : july 2009 ))*.