Perhaps you should try some spelling variations:
function relationship » function relationships
spatial relationships » social relationships, functional relationships
animal relationships » social relationships, functional 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 (function relationship))) OR (((spatial relationships) OR (spatial relations)))).
• Adding a wildcard symbol may retrieve word variants: ((((animal relationships) or (function relationship))) or (((spatial relationships) or (spatial relations))))*.