Perhaps you should try some spelling variations:
"modified objective evolutionary algorithm" » "modified objective evolution algorithm", "modified objective solution algorithm"
"modified parameters estimation algorithms" » "modified parameter estimation algorithms", "modified parameter estimates algorithms", "modified parameter optimization algorithms", "modified parameters estimation algorithm", "modified parameters optimization algorithms", "modified parameters optimisation 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 parameters estimation algorithms") OR ("modified objective evolutionary algorithm"))~.
• Removing quotes may allow a broader search: (( modified parameters estimation algorithms ) or ( modified objective evolutionary algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified parameters estimation algorithms") or ("modified objective evolutionary algorithm"))*.