Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
solutions algorithm » solution algorithm, evolution algorithm, evolutionary algorithm
modified positive » modified passive, modified adaptive
qoe optimization » game optimization, _ optimization, stage optimization
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 positive solutions algorithm ) OR ( modified qoe optimization algorithms ))~".
• Adding a wildcard symbol may retrieve word variants: (( modified positive solutions algorithm ) OR ( modified qoe optimization algorithms ))*.