Perhaps you should try some spelling variations:
"supply trade integration schemes." » "supply trade integration schengen.", "supply trade irrigation schemes.", "supply trade integration regimes.", "supply case integration schemes."
"supply great interaction series." » "supply great interactions series.", "supply great interaction studies.", "supply great interaction terms.", "supply parent interaction series.", "supply great contraction series.", "supply agent interaction series.", "supply growth interaction series.", "supply gap interaction series.", "supply gas interaction series."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply trade integration schemes.") or ("supply great interaction series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply trade integration schemes.") OR ("supply great interaction series.")).
• Removing quotes may allow a broader search: (( supply trade integration schemes. ) or ( supply great interaction series. )).
• Adding a wildcard symbol may retrieve word variants: (("supply trade integration schemes.") or ("supply great interaction series."))*.