Perhaps you should try some spelling variations:
integration theories » integration theorems, integrationstheorie 2, integration theory
irrigation scheme » irrigation systems
case integration » care integration, scale integration, based integration
trip irrigation » drip irrigation, crop irrigation, grain irrigation
supply case » supply cost, supply chain, supply curve
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: (( supply case integration theories. ) or ( supply trip irrigation scheme. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply case integration theories. ) OR ( supply trip irrigation scheme. )).
• Adding a wildcard symbol may retrieve word variants: (( supply case integration theories. ) or ( supply trip irrigation scheme. ))*.