Perhaps you should try some spelling variations:
communication conversation » communication information, communication cohesion, communication communication
conversation made » conversation a, conversation part, conversation _
interactions key » interactions k, interactions kevin, interventions key
interaction key » interactive key, integration key, interaction kemer

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

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