Perhaps you should try some spelling variations:
"heating options research : july 2009" » "heating actions research : july 2009", "heating optics research : july 2009", "heating operations research : july 2009", "heating solutions research : july 2009", "trading options research : july 2009", "making options research : july 2009", "heating options research : july 2008", "heating options research : july 2007", "heating options research : july 2019"
"mali action research : july 2006" » "mali national research : july 2006", "mali options research : july 2006", "mali action research : july 2008", "mali action research : july 2007", "mali action 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: (("heating options research : july 2009") or ("mali action research : july 2006"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("heating options research : july 2009") OR ("mali action research : july 2006")).
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• Adding a wildcard symbol may retrieve word variants: (("heating options research : july 2009") or ("mali action research : july 2006"))*.