Perhaps you should try some spelling variations:
communication foundation » communication education, communication communication, communication information
communication cohesion » communication collections, communication control, communication cost
decision fixed » decision field, decision aided, decision edited
post decision » costs decision, soft decision, joint decision
fixed line » mixed line, fixed linear, fixed links

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((communication foundation) or (communication cohesion)) post decision fixed line~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((communication foundation) OR (communication cohesion)) post decision fixed line.
• Adding a wildcard symbol may retrieve word variants: ((communication foundation) or (communication cohesion)) post decision fixed line*.