Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
training services » planning services, banking services
chn irrigation » change irrigation, canal irrigation, crop irrigation
supply chn » supply ch, supply chain, supply china
supply 3 » supply _, supply a, supply 4

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( supply 3 training services. ) or ( supply chn irrigation schemes. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply 3 training services. ) OR ( supply chn irrigation schemes. )).
• Adding a wildcard symbol may retrieve word variants: (( supply 3 training services. ) or ( supply chn irrigation schemes. ))*.