Perhaps you should try some spelling variations:
surface expression » surface erosion
formation imaging » formation slagging, formation image, formation dealing
imaging surface » moving surface, estimating surface, imaging surgical
array profiling » array processing, microarray profiling
array imaging » arrays imaging, airway imaging, ray imaging
array string » array strong, arrays strings, array sharing

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

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