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