Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
rates irrigation » water irrigation, pradesh irrigation, spate irrigation
export rates » export ratios, export ratio, export bases
import bans » import taxes
import das » import data, import tax, import ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( export rates irrigation schemes. ) or ( ((import das) or (import bans)) banking services. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( export rates irrigation schemes. ) OR ( ((import das) OR (import bans)) banking services. )).
• Adding a wildcard symbol may retrieve word variants: (( export rates irrigation schemes. ) or ( ((import das) or (import bans)) banking services. ))*.