Perhaps you should try some spelling variations:
"supply vertical integration theories." » "supply regional integration theories.", "supply vertical integration theorems.", "supply vertical integrationstheorie 2.", "supply vertical integration theory.", "supply partial integration theories.", "supply political integration theories.", "supply technical integration theories."
"supply asian integration social." » "supply asian international social.", "supply urban integration social.", "supply american integration social.", "supply spatial integration social.", "supply asia integration social.", "supply design integration social.", "supply ann integration social."

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

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