Perhaps you should try some spelling variations:
integer optimization » linear optimization, intelligent optimization, springer optimization
optimization problem » optimization problems
https microarray » data microarray, cells microarray, chip microarray
microarray chip » microarray cgh, microarrays case, microarrays cell
problem https » problem hips, problem has, problem hip

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

• Performing a fuzzy search may retrieve terms with similar spellings: integer optimization problem https microarray chip~.
• Adding a wildcard symbol may retrieve word variants: integer optimization problem https microarray chip*.