Perhaps you should try some spelling variations:
"_ multifactor research : july 2009" » "_ multifactors research : july 2009", "_ multisector research : july 2009", "_ multiactors research : july 2009", "_ multifactor research : july 2008", "_ multifactor research : july 2007", "_ multifactor research : july 2019", "_ multifaceted research : july 2009"
"multi factor research : july 2012" » "multi factors research : july 2012", "multi sector research : july 2012", "multi actors research : july 2012", "multi actor research : july 2012", "multi faceted research : july 2012", "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 2009") OR ("multi factor research : july 2012"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"_ multifactor research : july 2009\") OR (\"multi factor research : july 2012\"))".
• Removing quotes may allow a broader search: (( _ multifactor research : july 2009 ) OR ( multi factor research : july 2012 )).
• Adding a wildcard symbol may retrieve word variants: (("_ multifactor research : july 2009") OR ("multi factor research : july 2012"))*.