Perhaps you should try some spelling variations:
"supply trade integration theories." » "supply trade integration theory.", "supply trade integration through.", "supply trade integration efforts.", "supply side integration theories.", "supply case integration theories."
"supply china integrated services." » "supply china internet services.", "supply china integrating services.", "supply china integration services.", "supply gain integrated services.", "supply chains integrated services.", "supply chain integrated services."

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

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