Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
integrating volume » integration volume, integrating value, integation volume
data irrigation » delta irrigation, canal irrigation, water irrigation
2 integrating » _ integrating, 4 integrating, 6 integrating
supply 2 » supply _, supply a, supply 3

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( supply data irrigation schemes. ) OR ( supply 2 integrating volume. ))~".
• Adding a wildcard symbol may retrieve word variants: (( supply data irrigation schemes. ) OR ( supply 2 integrating volume. ))*.