Perhaps you should try some spelling variations:
"supply grid integration theory." » "supply grid integration through.", "supply grid information theory.", "supply grid innovation theory.", "supply great integration theory.", "support grid integration theory."
"supply crowd integration series." » "supply crowd integration services.", "supply crowd interaction series.", "supply crowd integration server.", "supply rfid integration series.", "supply beyond integration series.", "supply toward integration series.", "supply growth integration series.", "supply cost integration series.", "supply from integration series."

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 theory.") or ("supply crowd integration series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply grid integration theory.") OR ("supply crowd integration series.")).
• Removing quotes may allow a broader search: (( supply grid integration theory. ) or ( supply crowd integration series. )).
• Adding a wildcard symbol may retrieve word variants: (("supply grid integration theory.") or ("supply crowd integration series."))*.