Perhaps you should try some spelling variations:
"supply national integration policies." » "supply regional integration policies.", "supply national innovation policies.", "supply national integrity policies.", "supply national immigration policies.", "supply national international policies.", "supply national migration policies."
"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."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply national integration policies.") OR ("supply grid integration theories."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"supply national integration policies.\") OR (\"supply grid integration theories.\"))".
• Removing quotes may allow a broader search: (( supply national integration policies. ) OR ( supply grid integration theories. )).
• Adding a wildcard symbol may retrieve word variants: (("supply national integration policies.") OR ("supply grid integration theories."))*.