Perhaps you should try some spelling variations:
irrigation scheme » irrigation systems
data irrigation » canal irrigation, water irrigation, spate irrigation
time banking » home banking, sme banking, state banking
support data » import data, support a, export data
supply time » supply side, supply sides, supply pipes

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 time banking (services. OR series.) ) OR ( support data irrigation scheme. ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( supply time banking (services. OR series.) ) or ( support data irrigation scheme. ))~".
• Adding a wildcard symbol may retrieve word variants: (( supply time banking (services. OR series.) ) or ( support data irrigation scheme. ))*.