Perhaps you should try some spelling variations:
integration difference » integration different, integration differential, interactions differences
difference programming » different programming, preference programming, reference proqramming
programming activities » programme activities, programming activity, programming active
activities microarray » activation microarray
microarray chips » microarray chip, microarrays chip, microarray cross

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

• Performing a fuzzy search may retrieve terms with similar spellings: integration difference programming activities microarray chips~.
• Adding a wildcard symbol may retrieve word variants: integration difference programming activities microarray chips*.