Perhaps you should try some spelling variations:
intersections python » intersections without, intersection method, intersections non
programming examples » program examples, programming exercises, programming complete
programming sample » programming style, programming people, programming camps
microarray chips » microarray chip, microarrays chip, microarray cross

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "intersections python ((programming sample) OR (programming examples)) microarray chips~".
• Adding a wildcard symbol may retrieve word variants: intersections python ((programming sample) OR (programming examples)) microarray chips*.