Perhaps you should try some spelling variations:
"supply cost integration theories." » "supply cost integration theorems.", "supply cost integrationstheorie 2.", "supply cost integration theory.", "supply post integration theories.", "supply test integration theories.", "supply about integration theories.", "supply costs integration theories."
"supply de internet services." » "supply de internet service.", "supply der internet services.", "supply de interne services.", "supply de l'internet services.", "supply _ internet services.", "supply a internet services.", "supply 3 internet services."

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

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