Perhaps you should try some spelling variations:
function microarray » function microarrays, functional microarray, function micrornas
programming span » programming space, programming spasm, programming spss
program function » programme function, programs functional, program foundation
microarray chips » microarray chip, microarrays chip, microarray cross
span program » span programs, space program, asian program

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

• Performing a fuzzy search may retrieve terms with similar spellings: programming span program function microarray chips~.
• Adding a wildcard symbol may retrieve word variants: programming span program function microarray chips*.