Perhaps you should try some spelling variations:
"support grant international commercial." » "support grant international commerce.", "support grant international community.", "support grant international cooperation.", "support granted international commercial.", "support great international commercial.", "support transit international commercial."
"export trade integration theories." » "export trade integration theorems.", "export trade integrationstheorie 2.", "export trade integration theory.", "export taxes integration theories.", "export base integration theories.", "export tax integration theories."

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

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