Perhaps you should try some spelling variations:
"supply cost international policies." » "supply cost international politics.", "supply cost international prices.", "supply cost international policy.", "supply costs international policies.", "supply first international policies.", "supply joint 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 cost international policies."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply scale irrigation schemes.") OR ("supply cost international policies."))*.
• Removing quotes may allow a broader search: (( supply scale irrigation schemes. ) or ( supply cost international policies. ))*.