Perhaps you should try some spelling variations:
irrigation system » irrigation systems, irrigation water, irrigation scheme
flood irrigation » flood mitigation, led irrigation, farm irrigation
can information » care information, change information, fund information
supply flood » supply crowd, supply low
supply can » supply chain, supply case, supply a

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

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