Perhaps you should try some spelling variations:
integration theories » integration theory, integration through, integration efforts
irrigation schemes » irrigation scheme, irrigation systems
case irrigation » scale irrigation, change irrigation, canal irrigation
use integration » asean integration, deep integration, fare integration
supply case » supply cost, supply chain, supply curve
supply use » supply curve, supply asset, supply under

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 irrigation schemes. ) or ( supply use integration theories. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply case irrigation schemes. ) OR ( supply use integration theories. )).
• Adding a wildcard symbol may retrieve word variants: (( supply case irrigation schemes. ) or ( supply use integration theories. ))*.