Perhaps you should try some spelling variations:
"supply china integrated policies." » "supply china integration policies.", "supply china integrating policies.", "supply china integrated policy.", "supply change integrated policies.", "supply chains integrated policies.", "supply chain integrated policies."
"supply surface irrigation schemes." » "supply scale irrigation schemes.", "supply surface irrigation scheme.", "supply surface irrigation systems.", "supply service irrigation schemes.", "upper surface irrigation schemes."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply surface irrigation schemes.") or ("supply china integrated policies."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply surface irrigation schemes.") OR ("supply china integrated policies."))*.
• Removing quotes may allow a broader search: (( supply surface irrigation schemes. ) or ( supply china integrated policies. ))*.