Perhaps you should try some spelling variations:
"supply curve integration theories." » "supply curve integration theory.", "supply curve integration through.", "supply curve integration efforts.", "supply care integration theories.", "supply use integration theories.", "supply service integration theories."
"supply fare integration series." » "supply fare integrating services.", "supply fare integration schemes.", "supply fare integration social.", "supply market integration series.", "supply trade integration series.", "supply data integration series.", "supply farm integration series.", "supply case integration 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 curve integration theories.") or ("supply fare integration series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply curve integration theories.") OR ("supply fare integration series.")).
• Removing quotes may allow a broader search: (( supply curve integration theories. ) or ( supply fare integration series. )).
• Adding a wildcard symbol may retrieve word variants: (("supply curve integration theories.") or ("supply fare integration series."))*.