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 focusing method algorithm" » "machines using method algorithm", "machines focusing mom algorithm", "machines forecasting method algorithm"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified objective optimization algorithms") OR ("machines focusing method algorithm"))~.
• Removing quotes may allow a broader search: (( modified objective optimization algorithms ) or ( machines focusing method algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified objective optimization algorithms") or ("machines focusing method algorithm"))*.