Perhaps you should try some spelling variations:
national integration » regional integration, national innovation, national integrity
integration series » integration theories, integrating services, integration schemes
ratio integration » data integration, facto integration, spatial integration
integration some » integration volume, integration power, integration south
export » exports

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( export ratio integration some. ) or ( supply national integration series. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( export ratio integration some. ) OR ( supply national integration series. )).
• Adding a wildcard symbol may retrieve word variants: (( export ratio integration some. ) or ( supply national integration series. ))*.