Perhaps you should try some spelling variations:
"modified bi1 optimisation algorithms" » "modified bi1 optimisation algorithm", "modified bi1 optimization algorithms", "modified bi1 estimation algorithms", "modified _ optimisation algorithms", "modified _ optimization algorithms", "modified qoe optimization algorithms"
"modified parameter optimization algorithm" » "modified parameter optimization algorithms", "modified parameter optimisation algorithm", "modified parameter estimation algorithm", "modified parameters optimization 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 bi1 optimisation algorithms") OR ("modified parameter optimization algorithm"))~.
• Removing quotes may allow a broader search: (( modified bi1 optimisation algorithms ) or ( modified parameter optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified bi1 optimisation algorithms") or ("modified parameter optimization algorithm"))*.