Perhaps you should try some spelling variations:
communication coast » communication cost, communication fast, communication case
coast decision » cost decision, coast division, post decision
fixed minor » fixed mirror, fixed linear
fixed line » fixed linear, fixed links, fixed size
mixed line » mixed linear, mixed land, mixed ligand

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

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