Perhaps you should try some spelling variations:
preface diffusion » surface diffusion, preference diffusion, surfaces diffusion
array processing » dairy processing, query processing
information age » information storage
array probing » arrays probing, assay probing, array profiling
array string » array strong, arrays strings, array sharing
age preface » page preface, eges preface, a preface

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

• Performing a fuzzy search may retrieve terms with similar spellings: information age preface diffusion ((array string) or (((array probing) or (array processing))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information age preface diffusion ((array string) OR (((array probing) OR (array processing)))).
• Adding a wildcard symbol may retrieve word variants: information age preface diffusion ((array string) or (((array probing) or (array processing))))*.