Perhaps you should try some spelling variations:
"supply cost integration series." » "supply cost integration theories.", "supply cost integrating services.", "supply cost integration schemes.", "supply south integration series.", "supply tool integration series.", "supply can integration series.", "supply costs integration series."
"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."

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 cost integration series.") OR ("supply furrow irrigation system."))~.
• Removing quotes may allow a broader search: (( supply cost integration series. ) or ( supply furrow irrigation system. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply cost integration series.") or ("supply furrow irrigation system."))*.