Perhaps you should try some spelling variations:
"_ multinational research : july 2009" » "_ national research : july 2009", "_ international research : july 2009", "_ institutional research : july 2009", "_ multinational research : july 2013", "_ multinational research : july 2012", "_ multinational research : july 2011"
"multi accident research : july 2006" » "multi action research : july 2006", "multi vaccine research : july 2006", "multi accident research : july 2013", "multi accident research : july 2012", "multi accident research : july 2011"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("multi accident research : july 2006") or ("_ multinational research : july 2009"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("multi accident research : july 2006") OR ("_ multinational research : july 2009")).
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• Adding a wildcard symbol may retrieve word variants: (("multi accident research : july 2006") or ("_ multinational research : july 2009"))*.