Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
fare irrigation » farm irrigation, large irrigation, scale irrigation
national policy » national poverty
based national » based natural, based regional
supply based » supply case, supplies based, supply asia
supply fare » supply farm, supply case, supply figure

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

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