Perhaps you should try some spelling variations:
"supply channels information systems." » "supply chandos information systems.", "supply change information systems.", "supply chain information systems.", "supply chains information systems.", "supply channels information system."
"supply farm irrigation schemes." » "supply farm irrigation scheme.", "supply farm irrigation systems.", "supply scale irrigation schemes.", "supply canal irrigation schemes.", "supply from irrigation schemes.", "support farm 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 farm irrigation schemes.") OR ("supply channels information systems."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"supply farm irrigation schemes.\") OR (\"supply channels information systems.\"))".
• Removing quotes may allow a broader search: (( supply farm irrigation schemes. ) OR ( supply channels information systems. )).
• Adding a wildcard symbol may retrieve word variants: (("supply farm irrigation schemes.") OR ("supply channels information systems."))*.