Perhaps you should try some spelling variations:
"supply chai observation efforts." » "supply chai conservation efforts.", "supply chai conservation effort.", "supply chai observation networks.", "supply cai observation efforts.", "supply cao observation efforts.", "supply shi observation efforts.", "supply chains observation efforts.", "supply ch observation efforts.", "supply chain's observation efforts."
"supply chain integration series." » "supply chain integration services.", "supply chain interaction series.", "supply chain integration server.", "supply chainsn integration series.", "supply chn integration series.", "supply chain'sn integration series."

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

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