Perhaps you should try some spelling variations:
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
evolutionary algorithm » evolution algorithm, solution algorithm
modified staffing » modified caging
co evolutionary » co evolution
modified co » modified _, modified df, modified orca

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( modified staffing optimization algorithm ) or ( modified co evolutionary algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( modified staffing optimization algorithm ) OR ( modified co evolutionary algorithm )).
• Adding a wildcard symbol may retrieve word variants: (( modified staffing optimization algorithm ) or ( modified co evolutionary algorithm ))*.