Perhaps you should try some spelling variations:
integration schemes » integration schengen, integration regimes, integration some
factor integration » facto integration, sector integration, actor interaction
irrigation schemes » irrigation scheme, irrigation systems
side irrigation » saline irrigation, scale irrigation, under irrigation
supply factor » supply factors, supply sector

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 factor integration schemes. ) OR ( supply side irrigation schemes. ))~".
• Adding a wildcard symbol may retrieve word variants: (( supply factor integration schemes. ) OR ( supply side irrigation schemes. ))*.