Perhaps you should try some spelling variations:
"support china's integration policies." » "support china's immigration policies.", "support china's international policies.", "support china's migration policies.", "support chain integration policies.", "support china's information policies.", "support business integration policies."
"supply cost conservation efforts." » "supply coastal conservation efforts.", "supply forest conservation efforts.", "supply soil conservation efforts.", "supply costs conservation efforts."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("support china's integration policies.") or ("supply cost conservation efforts."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support china's integration policies.") OR ("supply cost conservation efforts."))*.
• Removing quotes may allow a broader search: (( support china's integration policies. ) or ( supply cost conservation efforts. ))*.