Perhaps you should try some spelling variations:
"supply side interaction series." » "supply side interactions series.", "supply side interaction studies.", "supply side interaction terms.", "supply time interaction series.", "supply like interaction series.", "supply node interaction series."
"supply about regulatory service." » "supply about regulatory services.", "supply about regulating service.", "supply about ambulatory services.", "supply about regular service.", "supply about regulation service.", "supply cost regulatory service.", "supply south regulatory service.", "supply asset regulatory service."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply side interaction series.") or ("supply about regulatory service."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply side interaction series.") OR ("supply about regulatory service.")).
• Removing quotes may allow a broader search: (( supply side interaction series. ) or ( supply about regulatory service. )).
• Adding a wildcard symbol may retrieve word variants: (("supply side interaction series.") or ("supply about regulatory service."))*.