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 2010", "multiple options research : june 2012"
"multi factor research : june 2014" » "multi factors research : june 2014", "multi sector research : june 2014", "multi actors research : june 2014", "multi actor research : june 2014", "_ multifactor research : june 2014", "multi factor research : june 2013"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("multi factor research : june 2014") OR ("multiple options research : june 2011"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"multi factor research : june 2014\") OR (\"multiple options research : june 2011\"))".
• Removing quotes may allow a broader search: (( multi factor research : june 2014 ) OR ( multiple options research : june 2011 )).
• Adding a wildcard symbol may retrieve word variants: (("multi factor research : june 2014") OR ("multiple options research : june 2011"))*.