Perhaps you should try some spelling variations:
"multi option research : july 2007" » "multi opinion research : july 2007", "multi action research : july 2007", "multi optics research : july 2007", "multi location research : july 2007", "multi population research : july 2007", "multi ratios research : july 2007", "multi option research : july 2008", "multi option research : july 2012", "multi option research : july 2020"
"multi care research : july 2013" » "multi change research : july 2013", "multi course research : july 2013", "multi peace research : july 2013", "multi core research : july 2013", "multi curve research : july 2013", "multi area research : july 2013"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("multi care research : july 2013") or ("multi option research : july 2007"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("multi care research : july 2013") OR ("multi option research : july 2007")).
• Removing quotes may allow a broader search: (( multi care research : july 2013 ) or ( multi option research : july 2007 )).
• Adding a wildcard symbol may retrieve word variants: (("multi care research : july 2013") or ("multi option research : july 2007"))*.