Perhaps you should try some spelling variations:
"supply costs integration schemes." » "supply costs integration schengen.", "supply costs irrigation schemes.", "supply costs integration regimes.", "supply comes integration schemes.", "supply post integration schemes.", "supply focus integration schemes."
"supply furrow irrigation system." » "supply farm irrigation system.", "supply crop irrigation system.", "supply flood irrigation system.", "supply furrow irrigation systems.", "supply furrow irrigation water.", "supply furrow irrigation scheme.", "supply from irrigation system."

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"supply costs integration schemes.\") OR (\"supply furrow irrigation system.\"))~".
• Removing quotes may allow a broader search: (( supply costs integration schemes. ) OR ( supply furrow irrigation system. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply costs integration schemes.") OR ("supply furrow irrigation system."))*.