Perhaps you should try some spelling variations:
"supply school conservation efforts." » "supply school construction efforts.", "supply soil conservation efforts.", "supply school cooperation efforts.", "supplies school conservation efforts.", "support school conservation efforts.", "supply shock conservation efforts."
"supply chain interaction series." » "supply chain interactions series.", "supply chain interaction studies.", "supply chain interaction terms.", "supply chain integration series.", "supply chain intervention series.", "supply spin interaction series."

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 chain interaction series.") OR ("supply school conservation efforts."))~.
• Removing quotes may allow a broader search: (( supply chain interaction series. ) or ( supply school conservation efforts. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply chain interaction series.") or ("supply school conservation efforts."))*.