Perhaps you should try some spelling variations:
"modified _ optimization algorithmssss" » "modified _ optimisation algorithm", "modified _ optimisation algorithmsss", "modified _ estimation algorithmssss", "modified _ estimation algorithmsss"
"modified parameters optimization algorithms" » "modified parameter optimization algorithms", "modified parameter estimation algorithms", "modified parameters optimisation algorithm", "modified parameters estimation algorithms", "modified parameters estimation 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 _ optimization algorithmssss") OR ("modified parameters optimization algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified _ optimization algorithmssss\") OR (\"modified parameters optimization algorithms\"))".
• Removing quotes may allow a broader search: (( modified _ optimization algorithmssss ) OR ( modified parameters optimization algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified _ optimization algorithmssss") OR ("modified parameters optimization algorithms"))*.