Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
bans irrigation » tank irrigation, canal irrigation, basin irrigation
data banking » data taking, data linking, data binning
import bans » import taxes
data asking » data passing, data using, data taking

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( import bans irrigation schemes. ) or ( import ((data banking) OR (data asking)) series. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( import bans irrigation schemes. ) OR ( import ((data banking) OR (data asking)) series. ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( import bans irrigation schemes. ) or ( import ((data banking) OR (data asking)) series. ))*".