Perhaps you should try some spelling variations:
"real options research : july 2012" » "real operations research : july 2012", "real action research : july 2012", "real opinion research : july 2012", "real options research : july 2013"
"scale options research : july 2011" » "scale operations research : july 2011", "scale action research : july 2011", "scale opinion research : july 2011", "call options research : july 2011", "share options research : july 2011", "care options research : july 2011", "scale options research : july 2013", "scale options research : june 2011"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("real options research : july 2012") OR ("scale options research : july 2011"))~.
• Removing quotes may allow a broader search: (( real options research : july 2012 ) or ( scale options research : july 2011 ))~.
• Adding a wildcard symbol may retrieve word variants: (("real options research : july 2012") or ("scale options research : july 2011"))*.