Perhaps you should try some spelling variations:
integration schemes » irrigation schemes, integration some, integration theories
"supply _ integration series." » "supply _ integration theories.", "supply _ integrating services.", "supply _ integration social."
supply trade » supply side
supply case » supply cost, supply chain, supply curve

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

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