Perhaps you should try some spelling variations:
functionality microarray » function microarrays, functional microrna
functional microarray » function microarrays, functional microrna, functional microbial
parallel sessions » parallel session, parallel version, parallel regions
sessions programs » persons programs, pension programs, session programme

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

• Performing a fuzzy search may retrieve terms with similar spellings: parallel sessions programs ((functionality microarray) OR (functional microarray)) chips~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "parallel sessions programs ((functionality microarray) OR (functional microarray)) chips".
• Adding a wildcard symbol may retrieve word variants: parallel sessions programs ((functionality microarray) OR (functional microarray)) chips*.