Perhaps you should try some spelling variations:
"modified bi1 optimization algorithms" » "modified bi1 optimisation algorithm", "modified bi1 estimation algorithm", "modified bi1 optimized algorithms", "modified _ optimization algorithms", "modified qoe optimization algorithms", "modified game optimization algorithms"
"modified parameter estimation algorithms" » "modified parameter estimation algorithm", "modified parameter optimisation algorithm", "modified parameter approximation algorithms", "modified parameter estimates algorithms", "modified parameter optimization algorithms"

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 optimization algorithms") OR ("modified parameter estimation algorithms"))~.
• Removing quotes may allow a broader search: (( modified bi1 optimization algorithms ) or ( modified parameter estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified bi1 optimization algorithms") or ("modified parameter estimation algorithms"))*.