Perhaps you should try some spelling variations:
"modified co evolutionary algorithm" » "modified co evolution algorithm", "modified co solution algorithm", "modified _ evolutionary algorithm", "modified df evolutionary algorithm", "modified orca evolutionary algorithm"
"modified complexity approximation algorithms" » "modified _mplexity approximation algorithms", "modified dfmplexity approximation algorithms", "modified orcamplexity approximation algorithms"

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 co evolutionary algorithm\") OR (\"modified complexity approximation algorithms\"))~".
• Removing quotes may allow a broader search: (( modified co evolutionary algorithm ) OR ( modified complexity approximation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified co evolutionary algorithm") OR ("modified complexity approximation algorithms"))*.