Perhaps you should try some spelling variations:
"modified parameter optimisation algorithmsss" » "modified parameter optimisation algorithm", "modified parameter optimization algorithms", "modified parameter estimation algorithms", "modified parameter optimization algorithmsss", "modified parameter estimation algorithmsss"
"defined network optimization algorithm" » "defined network optimization algorithms", "defined network optimisation algorithm", "defined network estimation algorithm"

Try widening your search to All Fields.

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 optimisation algorithmsss") or ("defined network optimization algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified parameter optimisation algorithmsss") OR ("defined network optimization algorithm")).
• Removing quotes may allow a broader search: (( modified parameter optimisation algorithmsss ) or ( defined network optimization algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified parameter optimisation algorithmsss") or ("defined network optimization algorithm"))*.