Perhaps you should try some spelling variations:
programmed preprocessor » programming preprocessor, programming preprocessing
preprocessor using » preprocessing using, preprocessor adding, processor using
using microarray » using microarrays, dna microarray, cdna microarray
microarray chips » microarray chip, microarrays chip, microarray cross

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

• Adding a wildcard symbol may retrieve word variants: processing programmed preprocessor using microarray chips*.