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 learning method algorithm" » "machine learning method algorithm", "machinery learning mom algorithm", "machinery learning methods algorithm", "machinery graining methods algorithm", "machinery learning emotion 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 learning method algorithm") or ("modified objective optimization algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("machinery learning method algorithm") OR ("modified objective optimization algorithm")).
• Removing quotes may allow a broader search: (( machinery learning method algorithm ) or ( modified objective optimization algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("machinery learning method algorithm") or ("modified objective optimization algorithm"))*.