Perhaps you should try some spelling variations:
information gain » information gap, information guide, information gathering
stroke perfusion » stroke diffusion, stroke depression
array profiling » array processing, microarray profiling
array sharing » arrays bearing, array imaging, way sharing
array string » array strong, arrays strings, array forming
gain stroke » pain stroke, brain stroke, wait stroke

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

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