Perhaps you should try some spelling variations:
vertical integration » regional integration
integration efforts » international efforts, conservation efforts
integration series » integration theories, integrating services, integration schemes
support vertical » support technical, airports vertical, support services
eu integration » _ integration, deep integration, data integration
support eu » support key, support _, support a

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( support eu integration series. ) OR ( support vertical integration efforts. ))~".
• Adding a wildcard symbol may retrieve word variants: (( support eu integration series. ) OR ( support vertical integration efforts. ))*.