Perhaps you should try some spelling variations:
"multi option research : july 2009" » "multi opinion research : july 2009", "multi action research : july 2009", "multi operations research : july 2009", "mali options research : july 2009", "multiple options research : july 2009", "multi option research : july 2006", "multi option research : july 2013", "multi option research : july 2011"
"multi option research : july 2012" » "multi opinion research : july 2012", "multi action research : july 2012", "multi operations research : july 2012", "mali options research : july 2012", "multiple options research : july 2012", "multi option 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: (("multi option research : july 2009") OR ("multi option research : july 2012"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"multi option research : july 2009\") OR (\"multi option research : july 2012\"))*".
• Removing quotes may allow a broader search: (( multi option research : july 2009 ) OR ( multi option research : july 2012 ))*.