Perhaps you should try some spelling variations:
introduction intervention » introduction interaction, instruction intervention, introduction intention
microarray microarray » microarrays microarray, microarrays microarrays, microrna microarray
program microarray » proteome microarray, from microarray, protein microarray
microarray https » microarrays https, microarray chips, microscopy https

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

• Performing a fuzzy search may retrieve terms with similar spellings: introduction intervention program microarray microarray https~.
• Adding a wildcard symbol may retrieve word variants: introduction intervention program microarray microarray https*.