Perhaps you should try some spelling variations:
integration schemes » irrigation schemes, integration some, integration theories
integration volume » integration policy
ratio integration » data integration, facto integration, national integration
grant integration » migrant integration, trade integration, grid integration
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 schemes. ) or ( support grant integration volume. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( export ratio integration schemes. ) OR ( support grant integration volume. )).
• Adding a wildcard symbol may retrieve word variants: (( export ratio integration schemes. ) or ( support grant integration volume. ))*.