Perhaps you should try some spelling variations:
"supply american integration theories." » "supply numerical integration theories.", "supply urban integration theories.", "supply american integration theorems.", "supply american integrationstheorie 2.", "supply american integration theory.", "supply mexican integration theories.", "supply africa integration theories.", "ugly american integration theories."
"supply grid integration efforts." » "supply grid international efforts.", "supply grid conservation efforts.", "supply crowd integration efforts.", "supply great integration efforts.", "support grid integration efforts."

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 efforts.") or ("supply american integration theories."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply grid integration efforts.") OR ("supply american integration theories."))*.
• Removing quotes may allow a broader search: (( supply grid integration efforts. ) or ( supply american integration theories. ))*.