Perhaps you should try some spelling variations:
"_ multifactor research : july 2008" » "_ multifactors research : july 2008", "_ multisector research : july 2008", "_ multiactors research : july 2008", "_ multifactor research : july 2013", "_ multifactor research : july 2012", "_ multifactor research : july 2020", "_ multifaceted research : july 2008"
"multi factor research : july 2006" » "multi factors research : july 2006", "multi sector research : july 2006", "multi actors research : july 2006", "multi actor research : july 2006", "multi faceted research : july 2006", "multi factor research : july 2007", "multi factor research : july 2009", "multi factor research : july 2013"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("_ multifactor research : july 2008") or ("multi factor research : july 2006"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("_ multifactor research : july 2008") OR ("multi factor research : july 2006")).
• Removing quotes may allow a broader search: (( _ multifactor research : july 2008 ) or ( multi factor research : july 2006 )).
• Adding a wildcard symbol may retrieve word variants: (("_ multifactor research : july 2008") or ("multi factor research : july 2006"))*.