Perhaps you should try some spelling variations:
integration volume » integration von
large irrigation » farm irrigation, drip irrigation, scale irrigation
supply large » supply charges, supply targets, supply curve
support grid » support agri, support grant, support group
supply grid » supply crowd, supply great
systems. » system.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( supply large irrigation systems. ) or ( ((supply grid) OR (support grid)) integration volume. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply large irrigation systems. ) OR ( ((supply grid) OR (support grid)) integration volume. )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( supply large irrigation systems. ) or ( ((supply grid) OR (support grid)) integration volume. ))".
• Adding a wildcard symbol may retrieve word variants: (( supply large irrigation systems. ) or ( ((supply grid) OR (support grid)) integration volume. ))*.