Perhaps you should try some spelling variations:
"supply costs integration theories." » "supply costs integration theorems.", "supply costs integrationstheorie 2.", "supply costs integration theory.", "supply comes integration theories.", "supply post integration theories.", "supply focus integration theories."
"supply crowd migration policies." » "supply crowd immigration policies.", "supply crowd migration policy.", "supply crowd education policies.", "supply cloud migration policies.", "supply around migration policies.", "supply growth migration policies.", "supply cost migration policies.", "supply from migration policies."

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

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