Perhaps you should try some spelling variations:
"supply de irrigation schemes." » "supply de irrigation scheme.", "supply de irrigation systems.", "supply de l'irrigation schemes.", "supply led irrigation schemes.", "supply fed irrigation schemes.", "supply _ irrigation schemes.", "supply a irrigation schemes.", "supply 3 irrigation schemes."
"supply syria irrigation system." » "supply syria irrigation systems.", "supply syria irrigation water.", "supply syria irrigation scheme.", "supply africa irrigation system.", "supply drip irrigation system.", "supply surge irrigation system.", "supply social irrigation system.", "supply sierra irrigation system."

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 de irrigation schemes.") OR ("supply syria irrigation system."))~.
• Removing quotes may allow a broader search: (( supply de irrigation schemes. ) or ( supply syria irrigation system. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply de irrigation schemes.") or ("supply syria irrigation system."))*.