Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
crop irrigation » drip irrigation, scale irrigation, canal irrigation
data internet » data internal, wto internet
support crop » support crops, support group, support cross
supply data » supply water
service. » services.

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

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