Perhaps you should try some spelling variations:
irrigation system » irrigation systems, irrigation water, irrigation scheme
testing services » existing services, lending services, training services
spate irrigation » scale irrigation, water irrigation, surge irrigation
food testing » field testing, seed testing
supply spate » supply system, supply side, supply water
supply food » supply from, supply cold, supply crowd

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

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