אולי כדאי לנסות איות אחר או כתיב מלא:
surface expression » surface erosion
information root » information robots, information role, information report
array imaging » arrays imaging, airway imaging, ray imaging
root surface » flat surface
array string » array strong, arrays strings, array sharing
array fermi » array forming, array format

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