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