Perhaps you should try some spelling variations:
irrigation scheme » irrigation systems
land information » fund information, und information, award information
grid irrigation » grain irrigation, drip irrigation, gray irrigation
support grid » support agri, support grant, support group
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: (( support grid irrigation scheme. ) or ( survey land information theory. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( support grid irrigation scheme. ) OR ( survey land information theory. )).
• Adding a wildcard symbol may retrieve word variants: (( support grid irrigation scheme. ) or ( survey land information theory. ))*.