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"
"modified trace evolution algorithm" » "modified trace solution algorithm", "modified trace evolutionary algorithm", "modified trace convolution algorithms", "modified time evolution algorithm", "modified traces evolution algorithm", "modified male evolution algorithm", "modified orca evolution 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 trace evolution algorithm") OR ("modified objective optimization algorithm"))~.
• Removing quotes may allow a broader search: (( modified trace evolution algorithm ) or ( modified objective optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified trace evolution algorithm") or ("modified objective optimization algorithm"))*.