Perhaps you should try some spelling variations:
optimization algorithmss » optimization algorithms, estimation algorithms, estimation algorithm
objective optimization » multiobjective optimization
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
robust optimisation » robust optimization

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 objective optimization algorithmss ) OR ( modified robust optimisation algorithm ))~".
• Adding a wildcard symbol may retrieve word variants: (( modified objective optimization algorithmss ) OR ( modified robust optimisation algorithm ))*.