Perhaps you should try some spelling variations:
crowd irrigation » crop irrigation, flood irrigation, from irrigation
integration some » integration south, integration soziale, integration social
supply crowd » supply growth, supply cost, supply from
export trade » export taxes, export base, export tax
systems. » system.

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

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