Perhaps you should try some spelling variations:
functional relationships » function relationships, function relationship, social relationships
spatial relationships » social relationships
animal relationships » social relationships
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 (spatial relations)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((animal relationships) or (functional relationships))) or (((spatial relationships) OR (spatial relations))))".
• Adding a wildcard symbol may retrieve word variants: ((((animal relationships) or (functional relationships))) or (((spatial relationships) OR (spatial relations))))*.