Perhaps you should try some spelling variations:
poverty intervention » poverty interventions, priority intervention, policy intervention
intervention efforts » prevention efforts, integration efforts, international efforts
irrigation schemes » irrigation scheme, irrigation systems
how irrigation » crop irrigation, from irrigation, high irrigation
supply how » supply shock

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 poverty intervention efforts. ) OR ( supply how irrigation schemes. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply poverty intervention efforts. ) or ( supply how irrigation schemes. ))*.