Perhaps you should try some spelling variations:
"supply grid integration theories." » "supply grid integration theory.", "supply grid integration through.", "supply grid integration efforts.", "supply trade integration theories.", "supply _ integration theories.", "supply data integration theories.", "supply crowd integration theories.", "support grid integration theories."
"supply cost integration policies." » "supply cost immigration policies.", "supply cost international policies.", "supply cost migration policies.", "supply south integration policies.", "supply tool integration policies.", "supply can integration policies.", "supply costs integration 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 grid integration theories.") or ("supply cost integration policies."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply grid integration theories.") OR ("supply cost integration policies.")).
• Removing quotes may allow a broader search: (( supply grid integration theories. ) or ( supply cost integration policies. )).
• Adding a wildcard symbol may retrieve word variants: (("supply grid integration theories.") or ("supply cost integration policies."))*.