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 grid integration theories.", "support urban integration theories."
"export trade integration some." » "export trade integration volume.", "export trade integration power.", "export trade integration south.", "export share integration some.", "export taxes integration some.", "export price integration some."

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 ("export trade integration some."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support grant integration theories.") OR ("export trade integration some.")).
• Removing quotes may allow a broader search: (( support grant integration theories. ) or ( export trade integration some. )).
• Adding a wildcard symbol may retrieve word variants: (("support grant integration theories.") or ("export trade integration some."))*.