Perhaps you should try some spelling variations:
"support china's integrating policies." » "support china's integration policies.", "support china's integrated policies.", "support china's integrating positive.", "support china integrating policies.", "support china integration policies."
"support migrant integration series." » "support market integration series.", "support migrant integration services.", "support migrant interaction series.", "support migrant integration server.", "support migrants integration series.", "support grant integration series.", "supporting migrants 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: (("support migrant integration series.") or ("support china's integrating policies."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support migrant integration series.") OR ("support china's integrating policies."))*.
• Removing quotes may allow a broader search: (( support migrant integration series. ) or ( support china's integrating policies. ))*.