Perhaps you should try some spelling variations:
"supply china integration policies." » "supply china immigration policies.", "supply china international policies.", "supply china migration policies.", "supply china's integration policies.", "supply china integrating policies.", "supply chip integration policies.", "supply chains integration policies.", "supply chain integration policies."
"support grant interaction series." » "support grant interactions series.", "support grant interaction studies.", "support grant interaction terms.", "support graph interaction series.", "support gradient interaction series.", "support plant interactions 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: (("supply china integration policies.") OR ("support grant interaction series."))~.
• Removing quotes may allow a broader search: (( supply china integration policies. ) or ( support grant interaction series. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply china integration policies.") or ("support grant interaction series."))*.