Perhaps you should try some spelling variations:
"supply chain integration theories." » "supply chain integration theory.", "supply chain integration through.", "supply chain integration efforts.", "supply trade integration theories.", "supply data integration theories.", "supply grid integration theories."
"support migrant integrated services." » "support migrant internet services.", "support migrant integration services.", "support mini integrated services.", "support grant 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 chain integration theories.") or ("support migrant integrated services."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply chain integration theories.") OR ("support migrant integrated services.")).
• Removing quotes may allow a broader search: (( supply chain integration theories. ) or ( support migrant integrated services. )).
• Adding a wildcard symbol may retrieve word variants: (("supply chain integration theories.") or ("support migrant integrated services."))*.