Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
internet services » internet service
side irrigation » saline irrigation, scale irrigation, under irrigation
case internet » based internet, cable internet, das internet
supply case » supply cost, supply chain, supply curve

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

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