Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
approximation algorithm » approximation algorithms
one approximation » time approximation, _ approximation, rough approximations
qoe optimization » game optimization, _ optimization, stage optimization
modified one » modified male, modified near, modified orca
modified qoe » modified male, modified _, modified bi1

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( modified one approximation algorithm ) OR ( modified qoe optimization algorithms ))~".
• Adding a wildcard symbol may retrieve word variants: (( modified one approximation algorithm ) OR ( modified qoe optimization algorithms ))*.