Perhaps you should try some spelling variations:
"modified _ optimization algorithmssss" » "modified _ optimization algorithms", "modified _ optimisation algorithm", "modified _ optimization algorithmsssss", "modified _ optimisation algorithmssss", "modified _ estimation algorithmssss"
"modified parameters optimization algorithm" » "modified parameter optimization algorithm", "modified parameter estimation algorithm", "modified parameters optimization algorithms", "modified parameters optimisation algorithm", "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 algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified _ optimization algorithmssss") OR ("modified parameters optimization algorithm")).
• Removing quotes may allow a broader search: (( modified _ optimization algorithmssss ) or ( modified parameters optimization algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified _ optimization algorithmssss") or ("modified parameters optimization algorithm"))*.