Perhaps you should try some spelling variations:
integration schemes » integration schengen, integration regimes, integration some
charges irrigation » change irrigation, large irrigation, surge irrigation
irrigation schemes » irrigation scheme, irrigation systems
supply charges » supply channels, supply chains, supply curves

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

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