Perhaps you should try some spelling variations:
"_ geographic society paper 1/2011" » "_ geographic mobility paper 1/2011", "_ geographic poverty paper 1/2011", "_ geographic success paper 1/2011", "_ geographic society papers 1/2011", "_ geographic society places 1/2011", "_ geographic society part 1/2011", "_ geographical society paper 1/2011", "_ geography society paper 1/2011", "_ geographic society paper _/2011", "_ geographic society paper i/2011", "_ geographic society paper 2/2011"
"do demographic shift paper v/2011" » "do demographic shifts paper v/2011", "do demographic gift paper v/2011", "do demographic life paper v/2011", "do demographics shift paper v/2011", "does demographic shift paper v/2011", "geo demographic shift paper v/2011", "do demographic short paper v/2011", "do demographic shift chapter v/2011", "do demographic shift cancer v/2011", "do demographic shift paper iv/2011", "do demographic shift paper _/2011", "do demographic shift paper i/2011"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("do demographic shift paper v/2011") OR ("_ geographic society paper 1/2011"))~.
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