Perhaps you should try some spelling variations:
interaction series » interactions series, interaction studies, interaction terms
surface irrigation » scale irrigation
grid interaction » grid integration, grid interactive, graph interaction
support surface » support service, upper surface, support services
support grid » support agri, support grant, support group
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: (( support grid interaction series. ) or ( support surface irrigation systems. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( support grid interaction series. ) OR ( support surface irrigation systems. )).
• Adding a wildcard symbol may retrieve word variants: (( support grid interaction series. ) or ( support surface irrigation systems. ))*.