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