Perhaps you should try some spelling variations:
"supply crowd integration challenges." » "supply crowd international challenges.", "supply crowd migration challenges.", "supply crowd innovation challenges.", "supply grid integration challenges.", "supply rfid integration challenges.", "supply beyond integration challenges.", "supply growth integration challenges.", "supply cost integration challenges.", "supply from integration challenges."
"supply guided information theory." » "supply guide information theory.", "supply added information theory.", "supply coded information theory.", "supply side information theory.", "supply sides information theory."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply crowd integration challenges.") or ("supply guided information theory."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply crowd integration challenges.") OR ("supply guided information theory."))*.
• Removing quotes may allow a broader search: (( supply crowd integration challenges. ) or ( supply guided information theory. ))*.