Perhaps you should try some spelling variations:
numerical population » numerical computation, numerical propagation, numerical simulation
population program » simulation program, population problem, population problems
program microarray » proteome microarray, from microarray, protein microarray
microarray https » microarrays https, microarray chips, microscopy https
program program » programs program, programming program

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

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