Perhaps you should try some spelling variations:
"multi location research : july 2006" » "multi locations research : july 2006", "multi education research : july 2006", "multi action research : july 2006", "multiple locations research : july 2006", "multiplication _ research : july 2006", "multi population research : july 2006", "multi location research : july 2008", "multi location research : july 2009", "multi location research : july 2013"
"multi option research : july 2007" » "multi opinion research : july 2007", "multi action research : july 2007", "multi optics research : july 2007", "multi population research : july 2007", "multi ratios research : july 2007", "multiple options research : july 2007", "multi option research : july 2008", "multi option research : july 2013", "multi option research : july 2012"

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 option research : july 2007") or ("multi location research : july 2006"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("multi option research : july 2007") OR ("multi location research : july 2006")).
• Removing quotes may allow a broader search: (( multi option research : july 2007 ) or ( multi location research : july 2006 )).
• Adding a wildcard symbol may retrieve word variants: (("multi option research : july 2007") or ("multi location research : july 2006"))*.