Perhaps you should try some spelling variations:
communication contributions » communication distribution, communication conclusions, communication collections
contributions ethics » contribution metrics, contributions evoiasp, contributions within
ethics dimension » ethical dimension, ethical dimensions, metrics dimensions
sample spaces » sample space, sample speeches, sample sizes
scale spaces » scale space, tuple spaces

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

• Performing a fuzzy search may retrieve terms with similar spellings: communication contributions ethics dimension ((scale spaces) or (sample spaces))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication contributions ethics dimension ((scale spaces) OR (sample spaces)).
• Adding a wildcard symbol may retrieve word variants: communication contributions ethics dimension ((scale spaces) or (sample spaces))*.