Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
aspect information » asset information, sheet information, perfect information
under irrigation » water irrigation, led irrigation
supply aspect » supply asset, supply assets
supply under » supply side, supply water, supply sides

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 under irrigation schemes. ) OR ( supply aspect information theory. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply under irrigation schemes. ) or ( supply aspect information theory. ))*.