Perhaps you should try some spelling variations:
"supply gap integration theories." » "supply gap integration theorems.", "supply gap integrationstheorie 2.", "supply gap integration theory.", "supply erp integration theories.", "supply fsp integration theories.", "supply data integration theories.", "supply a integration theories."
"supply chain integrating services." » "supply chain integration services.", "supply chain integrated services.", "supply chain regulating services.", "supply china integrating services.", "supply change integrating 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 gap integration theories.") or ("supply chain integrating services."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply gap integration theories.") OR ("supply chain integrating services."))*.
• Removing quotes may allow a broader search: (( supply gap integration theories. ) or ( supply chain integrating services. ))*.