A sua pesquisa - ((communication cost) or (communication case)) basics dimensions ((age level) or (rate levels)) - não corresponde a nenhum registo.

Talvez deva tentar algumas variações de ortografia:
communication cost » communication cross, communication control, communication concepts
communication case » communication channels, communication culture
basics dimensions » basic dimensions, physics dimensions, based dimensions
rate levels » water levels, state levels, trace levels
age level » age levels, page level, wage levels

Pode obter mais resultados ajustando a pesquisa.