Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
objective optimization » multiobjective optimization
optimization algorithm » optimisation algorithm, estimation algorithm, estimation algorithms
charging optimization » staffing optimization
modified charging » modified caging, modified carbon

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( modified charging optimization algorithms ) OR ( modified objective optimization algorithm ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( modified charging optimization algorithms ) OR ( modified objective optimization algorithm ))".
• Adding a wildcard symbol may retrieve word variants: (( modified charging optimization algorithms ) OR ( modified objective optimization algorithm ))*.