Perhaps you should try some spelling variations:
intersections python » intersections without, intersection method, intersections non
microarray cross » microarray probes, microarray chips, microarray post
python program » python programs, action program, python programming
day microarray » data microarray, hay microarrays, dna microarray
program day » program dan, programme day, program data

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

• Performing a fuzzy search may retrieve terms with similar spellings: intersections python program day microarray cross~.
• Adding a wildcard symbol may retrieve word variants: intersections python program day microarray cross*.