Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
integration theory » integration through, information theory, innovation theory
fare integration » trade integration, die integration
supply fare » supply farm, supply figure, supply curve
supply case » supply chain, supply curve, supply costs
supply cost » supply costs

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

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