Perhaps you should try some spelling variations:
"i options research : july 2009" » "i actions research : july 2009", "i optics research : july 2009", "i operations research : july 2009", "4 options research : july 2009", "2 options research : july 2009", "iii options research : july 2009", "i options research : july 2008", "i options research : july 2007", "i options research : july 2019"
"scale options research : july 2006" » "scale actions research : july 2006", "scale optics research : july 2006", "scale operations research : july 2006", "share options research : july 2006", "care options research : july 2006", "case options research : july 2006", "scale options research : july 2008", "scale options research : july 2007", "scale options 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: (("i options research : july 2009") or ("scale options research : july 2006"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("i options research : july 2009") OR ("scale options research : july 2006")).
• Removing quotes may allow a broader search: (( i options research : july 2009 ) or ( scale options research : july 2006 )).
• Adding a wildcard symbol may retrieve word variants: (("i options research : july 2009") or ("scale options research : july 2006"))*.