Perhaps you should try some spelling variations:
ocean conservation » ocean observation, local conservation, area conservation
irrigation schemes » irrigation scheme, irrigation systems
under irrigation » water irrigation, led irrigation
supply ocean » supply chain, supply oecd, supply chai
supply under » supply order, supply united, supply siders

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

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