Perhaps you should try some spelling variations:
communication conversation » communication information, communication cohesion, communication communication
conversation based » conversion based, conversation basic, conversation made
based decision » based design
a dan » 4 dan, n dan, j dan
a day » _ day
_ dan » _ day
l dan » l van

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 based decision ((((((a dan) OR (a day))) or (_ dan))) or (l dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication conversation based decision ((((((a dan) OR (a day))) OR (_ dan))) OR (l dan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "communication conversation based decision ((((((a dan) OR (a day))) or (_ dan))) or (l dan))".
• Adding a wildcard symbol may retrieve word variants: communication conversation based decision ((((((a dan) OR (a day))) or (_ dan))) or (l dan))*.