Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
strategic options » strategic action, strategic plans, strategic directions
staff irrigation » scale irrigation, spate irrigation, runoff irrigation
effort strategic » reform strategic, export strategies, reforms strategic
options term » options sri

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( support staff irrigation schemes. ) or ( effort strategic options term. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( support staff irrigation schemes. ) OR ( effort strategic options term. )).
• Adding a wildcard symbol may retrieve word variants: (( support staff irrigation schemes. ) or ( effort strategic options term. ))*.