Perhaps you should try some spelling variations:
information requirements » nutrition requirements, irrigation requirements, information environments
requirements a » requirements _
maps euclidean » a euclidean, spaces euclidean, groups euclidean
dspaces » ddspaces
dddspaces » ddddspaces
space » dspace

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

• Performing a fuzzy search may retrieve terms with similar spellings: information requirements a ((maps euclidean) or ((dspaces or dddspaces) euclidean)) space~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information requirements a ((maps euclidean) OR ((dspaces OR dddspaces) euclidean)) space.
• Adding a wildcard symbol may retrieve word variants: information requirements a ((maps euclidean) or ((dspaces or dddspaces) euclidean)) space*.