Perhaps you should try some spelling variations:
"multiple options research : june 2011" » "multiple locations research : june 2011", "multiple positions research : june 2011", "multiple solutions research : june 2011", "multiple actions research : june 2011", "multiple optics research : june 2011", "multiple operations research : june 2011", "multiple options research : june 2013", "multiple options research : june 2014", "multiple options research : june 2010"
"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 2007", "multi action research : july 2019"

Try widening your search to All Fields.

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 : june 2011") or ("multi action research : july 2009"))~.
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• Removing quotes may allow a broader search: (( multiple options research : june 2011 ) or ( multi action research : july 2009 )).
• Adding a wildcard symbol may retrieve word variants: (("multiple options research : june 2011") or ("multi action research : july 2009"))*.