Perhaps you should try some spelling variations:
integration schemes » integration schengen, irrigation schemes, integration regimes
irrigation scheme » irrigation systems
trip irrigation » drip irrigation, crop irrigation, grain irrigation
support grid » support agri, support grant, support group
supply trip » supply tariff, supply trade

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( support grid integration schemes. ) or ( supply trip irrigation scheme. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( support grid integration schemes. ) OR ( supply trip irrigation scheme. )).
• Adding a wildcard symbol may retrieve word variants: (( support grid integration schemes. ) or ( supply trip irrigation scheme. ))*.