Perhaps you should try some spelling variations:
international policies » international politics, international prices, international policy
irrigation schemes » irrigation scheme, irrigation systems
grid international » 3rd international, third international, build international
support grid » support agri, support grant, support group

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

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