Perhaps you should try some spelling variations:
communication documentation » communication foundation, communication communication
communication conversation » communication information, communication cohesion, communication communication
basics dimensions » basic dimensions, physics dimensions, based dimensions
dimensions causal » dimensional causal, dimensions causes, dimensions lateral
causal tree » causal order, causal force

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((communication documentation) or (communication conversation)) basics dimensions causal tree~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((communication documentation) OR (communication conversation)) basics dimensions causal tree.
• Adding a wildcard symbol may retrieve word variants: ((communication documentation) or (communication conversation)) basics dimensions causal tree*.