Perhaps you should try some spelling variations:
"supply trade integration theories." » "supply trade integration through.", "supply trade integration efforts.", "supply trade integration reforms.", "supply side integration theories.", "supply case integration theories."
"supply tool integration theory." » "supply tool integration through.", "supply tool information theory.", "supply tool integration report.", "supply global integration theory.", "supply social integration theory.", "supply _ integration theory.", "supply school integration theory.", "support tool integration theory."

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 theories.") or ("supply tool integration theory."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply trade integration theories.") OR ("supply tool integration theory.")).
• Removing quotes may allow a broader search: (( supply trade integration theories. ) or ( supply tool integration theory. )).
• Adding a wildcard symbol may retrieve word variants: (("supply trade integration theories.") or ("supply tool integration theory."))*.