Perhaps you should try some spelling variations:
interactions series » interactions between
irrigation schemes » irrigation scheme, irrigation systems
data irrigation » delta irrigation, canal irrigation, water irrigation
a interactions » 4 interactions, 3 interactions, a interaction
support data » support de
support a » support _

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

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