Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
land information » fund information, award information, road information
grid irrigation » drip irrigation, syria irrigation, crop irrigation
supply grid » supply crowd, support grid
survey land » surveys poland, survey uganda, survey based

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

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