Perhaps you should try some spelling variations:
"supply side integration theories." » "supply side integration theory.", "supply side integration through.", "supply side integration efforts.", "supply trade integration theories.", "supply asian integration theories.", "supply grid integration theories."
"supply power integration series." » "supply power integrating services.", "supply power integration schemes.", "supply power integration social.", "supply border integration series.", "supply policy integration series.", "supply deeper integration series.", "supply poverty integration series.", "supply water integration series.", "supply how 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 side integration theories.") or ("supply power integration series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply side integration theories.") OR ("supply power integration series.")).
• Removing quotes may allow a broader search: (( supply side integration theories. ) or ( supply power integration series. )).
• Adding a wildcard symbol may retrieve word variants: (("supply side integration theories.") or ("supply power integration series."))*.