Perhaps you should try some spelling variations:
introduction elementary » introduction elements, introduction experimental
elementary theoretical » elements theoretical, complementary theoretical, elementary mathematical
theoretical diffusion » theoretical discussion, theoretical discussions, theoretical dimensions
microarray profiling » microrna profiling
arrays profiling » array profiling, arrays probing, arrays producing

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

• If you are trying to use Boolean operators, they must be ALL CAPS: introduction elementary theoretical diffusion ((microarray profiling) OR (arrays profiling))~.
• Adding a wildcard symbol may retrieve word variants: introduction elementary theoretical diffusion ((microarray profiling) or (arrays profiling))*.