Perhaps you should try some spelling variations:
"support trade integration theories." » "support trade integration theory.", "support trade integration through.", "support trade integration efforts.", "export trade integration theories.", "support grant integration theories.", "import trade integration theories."
"supply grid integration series." » "supply grid integrating services.", "supply grid integration schemes.", "supply grid integration social.", "supply _ integration series.", "supply data integration series.", "supply crowd integration series.", "support grid 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: (("support trade integration theories.") or ("supply grid integration series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support trade integration theories.") OR ("supply grid integration series.")).
• Removing quotes may allow a broader search: (( support trade integration theories. ) or ( supply grid integration series. )).
• Adding a wildcard symbol may retrieve word variants: (("support trade integration theories.") or ("supply grid integration series."))*.