Perhaps you should try some spelling variations:
communication functions » communicative functions, communication foundations, communication foundation
based dimension » based dispersion, basic dimensions, based diffusion
based extension » based extraction
array ang » arrays ang, array along, array range
arrays a » arrays _

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 dimension) or (based extension)) ((array ang) or (arrays a))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication functions ((based dimension) OR (based extension)) ((array ang) OR (arrays a)).
• Adding a wildcard symbol may retrieve word variants: communication functions ((based dimension) or (based extension)) ((array ang) or (arrays a))*.