Perhaps you should try some spelling variations:
introduction complementary » introduction commentary, introduction elementary, interactions complementary
complementary problems » complementary problem, complementarity problems, complementarity problem
problems diffraction » problems directions, problems differential, problems fiction
microarray profiling » microrna profiling
array probing » arrays probing, assay probing, array profiling

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 complementary problems diffraction ((microarray profiling) OR (array probing))~.
• Adding a wildcard symbol may retrieve word variants: introduction complementary problems diffraction ((microarray profiling) or (array probing))*.