Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
saline irrigation » saving irrigation, scale irrigation, basin irrigation
chai regulating » ii regulating, ban regulating, cues regulating
supply saline » supply side, supply lines
supply chai » supply chain, supply chains, supply ch

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

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