Perhaps you should try some spelling variations:
irrigation scheme » irrigation systems
after irrigation » water irrigation, under irrigation, fed irrigation
export after » export matter, effort after, export pattern
import state » import share, port state, import shares
bank reserve » bank reserves, bank research, cash reserve
banks serve » banks reserve, banks were, bank service

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( export after irrigation scheme. ) or ( import state ((banks serve) or (bank reserve)). ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( export after irrigation scheme. ) OR ( import state ((banks serve) OR (bank reserve)). )).
• Adding a wildcard symbol may retrieve word variants: (( export after irrigation scheme. ) or ( import state ((banks serve) or (bank reserve)). ))*.