Perhaps you should try some spelling variations:
spate irrigation » scale irrigation, water irrigation, surge irrigation
banking series » banking services, making series, banking service
export spate » export share, export shares, export system
import state » import share, import shares, support state
systems. » system.
export » expart, expost
import » impart, impost
port » part, post

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

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