Talvez debería tentar con algunhas variantes ortográficas:
formation extraction » information extraction, formation interaction, creation extraction
array formulas » area formulas, harrop formulas, array format
methods rules » methods role, methods results, methods tables
array imaging » arrays imaging, airway imaging, ray imaging
array arcing » array forming, array probing, array sharing

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

• If you are trying to use Boolean operators, they must be ALL CAPS: formation extraction methods rules ((((array imaging) OR (array formulas))) OR (array arcing))~.
• Adding a wildcard symbol may retrieve word variants: formation extraction methods rules ((((array imaging) or (array formulas))) or (array arcing))*.