Perhaps you should try some spelling variations:
integer formulation » integral formulation, integral formulations, integer permutations
formulation program » simulation program, population program, formulation problem
microarray https » microarrays https, microarray chips, microscopy https
code microarray » wide microarray, course microarray, color microarray
program code » program model, program models, program c

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

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