Perhaps you should try some spelling variations:
"support miimmigrant integration efforts." » "support immigrant integration efforts.", "support immigrants integration efforts.", "support migrant integration efforts.", "support miimmigrant international efforts.", "support miimmigrant conservation efforts."
"support migrants integration series." » "support migrant integration series.", "support immigrants integration series.", "support migrants l'integration series.", "support migrants integration services.", "support migrants interaction series.", "support migrants integration server.", "supporting migrants integration series.", "support grant integration series."

Try widening your search to All Fields.

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

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