Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
saline irrigation » saving irrigation, scale irrigation, basin irrigation
supply chennai » supply china, supply chai
supply saline » supply side, supply lines
regulating » regulations, regulation

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

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