Perhaps you should try some spelling variations:
"general international policy series." » "general information policy series.", "general international poverty series.", "general international prices series.", "general national policy series."
"regional integration political elites." » "regional integration politics elites.", "regional international political elites.", "regional integration policies elites.", "regional integration political elite."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("general international policy series.") OR ("regional integration political elites."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"general international policy series.\") OR (\"regional integration political elites.\"))".
• Removing quotes may allow a broader search: (( general international policy series. ) OR ( regional integration political elites. )).
• Adding a wildcard symbol may retrieve word variants: (("general international policy series.") OR ("regional integration political elites."))*.