Perhaps you should try some spelling variations:
"modified parameter optimization algorithms" » "modified parameter optimisation algorithm", "modified parameter estimation algorithms", "modified parameter estimation algorithm", "modified parameters optimization algorithms"
"modified objective predators algorithm" » "modified objective predation algorithm"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified parameter optimization algorithms") OR ("modified objective predators algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified parameter optimization algorithms\") OR (\"modified objective predators algorithm\"))".
• Removing quotes may allow a broader search: (( modified parameter optimization algorithms ) OR ( modified objective predators algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified parameter optimization algorithms") OR ("modified objective predators algorithm"))*.