Perhaps you should try some spelling variations:
"a demographic factor papers _/2011" » "a demographic factors papers _/2011", "a geographic factors papers _/2011", "a demographic actions papers _/2011", "_ demographic factor papers _/2011", "a demographic sector papers _/2011", "a demographic factor layer _/2011", "a demographic factor water _/2011"
"do demographics make players 2/2011" » "do demographic make players 2/2011", "do demographics case players 2/2011", "do demographics matter players 2/2011", "_ demographics make players 2/2011", "1 demographics make players 2/2011", "2 demographics make players 2/2011", "do demographics market players 2/2011", "do demographics main players 2/2011", "do demographics same players 2/2011", "do demographics make players _/2011", "do demographics make players a/2011", "do demographics make players 1/2011"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("do demographics make players 2/2011") or ("a demographic factor papers _/2011"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("do demographics make players 2/2011") OR ("a demographic factor papers _/2011")).
• Removing quotes may allow a broader search: (( do demographics make players 2/2011 ) or ( a demographic factor papers _/2011 )).
• Adding a wildcard symbol may retrieve word variants: (("do demographics make players 2/2011") or ("a demographic factor papers _/2011"))*.