Perhaps you should try some spelling variations:
integration efforts » international efforts, conservation efforts
irrigation schemes » irrigation scheme, irrigation systems
furrow irrigation » farm irrigation, crop irrigation, flood irrigation
supply furrow » supply from
support grid » support agri, support grant, support group

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( supply furrow irrigation schemes. ) OR ( support grid integration efforts. ))~".
• Adding a wildcard symbol may retrieve word variants: (( supply furrow irrigation schemes. ) OR ( support grid integration efforts. ))*.