Perhaps you should try some spelling variations:
"supply chain international policies." » "supply chain international politics.", "supply chain international prices.", "supply chain international policy.", "supply china international policies.", "supply can international policies.", "supply sharing international policies."
"supply scale irrigation schemes." » "supply scale irrigation scheme.", "supply scale irrigation systems.", "supply case irrigation schemes.", "supply scheme irrigation schemes.", "supply social 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 scale irrigation schemes.") or ("supply chain international policies."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply scale irrigation schemes.") OR ("supply chain international policies."))*.
• Removing quotes may allow a broader search: (( supply scale irrigation schemes. ) or ( supply chain international policies. ))*.