Perhaps you should try some spelling variations:
"modified objective optimization algorithms" » "modified objective optimisation algorithm", "modified objective estimation algorithms", "modified objective estimation algorithm", "modified multiobjective optimization algorithms"
"machines using real algorithm" » "machinery using real algorithm", "machines using adam algorithm", "machines using search algorithm", "machines using metal algorithm", "machines using raw 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 objective optimization algorithms") or ("machines using real algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified objective optimization algorithms") OR ("machines using real algorithm")).
• Removing quotes may allow a broader search: (( modified objective optimization algorithms ) or ( machines using real algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified objective optimization algorithms") or ("machines using real algorithm"))*.