Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
social irrigation » local irrigation, scale irrigation, social mitigation
support social » supporting social, supply social
inter services » water services, under services, liner services
from inter » from internal, from internet, from insider

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

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