Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
bans irrigation » tank irrigation, canal irrigation, basin irrigation
linking series » banking series, linking service, making series
data linking » data taking, data linkage
export bans » export base, export bias, import bans
import data » import duty

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( export bans irrigation schemes. ) or ( import data linking series. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( export bans irrigation schemes. ) OR ( import data linking series. ))*.