Perhaps you should try some spelling variations:
"modified objective optimization algorithm" » "modified multiobjective optimization algorithm", "modified objective optimization algorithms", "modified objective optimisation algorithm", "modified objective estimation algorithm"
"machinery using force algorithm" » "machines using force algorithm", "machinery using source algorithm", "machinery using search algorithm", "machinery using morse algorithm", "machinery cutting force algorithm"

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

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