Perhaps you should try some spelling variations:
"multi factor research : july 2009" » "multi sector research : july 2009", "multi action research : july 2009", "multi water research : july 2009", "_ multifactor research : july 2009", "multi faceted research : july 2009", "multi factor research : july 2013", "multi factor research : july 2012", "multi factor research : july 2011"
"multi option research : july 2006" » "multi opinion research : july 2006", "multi action research : july 2006", "multi operations research : july 2006", "mali options research : july 2006", "multiple options research : july 2006", "multi option research : july 2013", "multi option research : july 2012", "multi option research : july 2011"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("multi option research : july 2006") or ("multi factor research : july 2009"))~.
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• Adding a wildcard symbol may retrieve word variants: (("multi option research : july 2006") or ("multi factor research : july 2009"))*.