Perhaps you should try some spelling variations:
existing services » exporting services, testing services, nursing services
irrigation scheme » irrigation systems
water irrigation » scale irrigation, canal irrigation, farm irrigation
cote existing » co existing, some existing, other existing
supply cote » supply costs, supply cost, supply case

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

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