Perhaps you should try some spelling variations:
functional relationships » function relationships, function relationship
social relationships » social relations
spatial relations » spatial resolution

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((((animal relationships) OR (functional relationships))) OR (((((spatial relationships) OR (social relationships))) OR (spatial relations)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((animal relationships) or (functional relationships))) or (((((spatial relationships) OR (social relationships))) or (spatial relations))))".
• Adding a wildcard symbol may retrieve word variants: ((((animal relationships) or (functional relationships))) or (((((spatial relationships) OR (social relationships))) or (spatial relations))))*.