Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
law integrated » how integrated, new integrated, cae integrated
et irrigation » led irrigation, _ irrigation, water irrigation
supply law » supply low, supply a, supply malawi
supply et » supply _, supply a, supply 3
systems. » system.

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

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