Perhaps you should try some spelling variations:
irrigation scheme » irrigation systems
fund information » road information
crop irrigation » drip irrigation, scale irrigation, canal irrigation
supply crop » supply crowd, supply from, supply europe
survey fund » survey und, survey round, survey rounds

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

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