Perhaps you should try some spelling variations:
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
charging estimation » charging station
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 estimation algorithms ) OR ( modified multiobjective optimization algorithm ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( modified charging estimation algorithms ) OR ( modified multiobjective optimization algorithm ))".
• Adding a wildcard symbol may retrieve word variants: (( modified charging estimation algorithms ) OR ( modified multiobjective optimization algorithm ))*.