Perhaps you should try some spelling variations:
microarray profiling » microrna profiling
surface diffusion » state diffusion
information gain » information gap, information guide, information gathering
array probing » arrays probing, assay probing, array profiling
gain surface » grain surface, rain surface, brain surface
array using » arrays using

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