Perhaps you should try some spelling variations:
irrigation scheme » irrigation systems
gas irrigation » gray irrigation, basin irrigation, grain irrigation
gap internet » das internet, up internet, paper internet
supply gap » supply a
supply gas » supply case, supply a, supply great
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 gap internet service. ) or ( supply gas irrigation scheme. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply gap internet service. ) OR ( supply gas irrigation scheme. )).
• Adding a wildcard symbol may retrieve word variants: (( supply gap internet service. ) or ( supply gas irrigation scheme. ))*.