Perhaps you should try some spelling variations:
microarray profiling » microrna profiling
information gain » information gap, information guide, information gathering
state diffusion » surface diffusion
array string » array strong, arrays strings, array sharing
array arcing » array forming, array probing, array sharing
gain state » gain stage, pain states, kayin state

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 state diffusion ((array string) or (((array arcing) or (microarray profiling))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information gain state diffusion ((array string) OR (((array arcing) OR (microarray profiling)))).
• Adding a wildcard symbol may retrieve word variants: information gain state diffusion ((array string) or (((array arcing) or (microarray profiling))))*.