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

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