Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithm" » "modified multiobjective optimization algorithms", "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithm"
"machines using open algorithm" » "machinery using open algorithm", "machines using mppt algorithm", "machines using our algorithm", "machines using driven algorithm", "machines using opencl algorithm", "machines using one algorithm"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified multiobjective optimization algorithm") or ("machines using open algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified multiobjective optimization algorithm") OR ("machines using open algorithm")).
• Removing quotes may allow a broader search: (( modified multiobjective optimization algorithm ) or ( machines using open algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified multiobjective optimization algorithm") or ("machines using open algorithm"))*.