Perhaps you should try some spelling variations:
communication cohesion » communication collections, communication control, communication cost
cohesion data » conversion data, corrosion data, cohesion a
decision de » decision _, decision game, decision aids
decision 3 » decision _, decision 7, decision 8
decision a » decision _, decision aid, decision game

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: communication cohesion data ((((decision 3) OR (decision a))) OR (decision de)) liburd~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "communication cohesion data ((((decision 3) OR (decision a))) or (decision de)) liburd~".
• Adding a wildcard symbol may retrieve word variants: communication cohesion data ((((decision 3) OR (decision a))) or (decision de)) liburd*.