Perhaps you should try some spelling variations:
communication functions » communicative functions, communication foundations, communication foundation
based dispersion » wave dispersion, gas dispersion, based discussion
functions based » function based
array string » array strong, arrays strings, array sharing
array arcing » array forming, array probing, array sharing
arrays ang » arrays a

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

• Performing a fuzzy search may retrieve terms with similar spellings: communication functions based dispersion ((((array string) or (array arcing))) or (arrays ang))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication functions based dispersion ((((array string) OR (array arcing))) OR (arrays ang)).
• Adding a wildcard symbol may retrieve word variants: communication functions based dispersion ((((array string) or (array arcing))) or (arrays ang))*.