Perhaps you should try some spelling variations:
"europe pacific research unit series." » "europe basic research unit series.", "europe pacific research united series."
"european policy research action series." » "european politics research action series.", "european policy research section series.", "european policy research location series.", "european policy research act series.", "european policy research education series."

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("europe pacific research unit series.") OR ("european policy research action series."))~.
• Removing quotes may allow a broader search: (( europe pacific research unit series. ) or ( european policy research action series. ))~.
• Adding a wildcard symbol may retrieve word variants: (("europe pacific research unit series.") or ("european policy research action series."))*.