Perhaps you should try some spelling variations:
"supply trade immigration policies." » "supply trade immigration policy.", "supply trade migration policy.", "supply trade migration policies.", "supply race immigration policies.", "supply trade integration policies.", "supply case immigration policies."
"supply scale integration series." » "supply scale integration services.", "supply scale interaction series.", "supply scale integration server.", "supply care integration series.", "supply soziale integration series.", "supply trade integration series.", "supply case integration series.", "supply scheme integration series.", "supply social integration series."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply scale integration series.") or ("supply trade immigration policies."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply scale integration series.") OR ("supply trade immigration policies.")).
• Removing quotes may allow a broader search: (( supply scale integration series. ) or ( supply trade immigration policies. )).
• Adding a wildcard symbol may retrieve word variants: (("supply scale integration series.") or ("supply trade immigration policies."))*.