Perhaps you should try some spelling variations:
"modified orcadmplexity approximation algorithms" » "modified complexity approximation algorithms", "modified dorcadmplexity approximation algorithms", "modified orcaddmplexity approximation algorithms", "modified ohcadmplexity approximation algorithms"
"modified orca evolutionary algorithm" » "modified orca evolution algorithm", "modified orca solution algorithm", "modified dorca evolutionary algorithm", "modified orcad evolutionary algorithm", "modified ohca evolutionary algorithm"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified orca evolutionary algorithm") OR ("modified orcadmplexity approximation algorithms"))~.
• Removing quotes may allow a broader search: (( modified orca evolutionary algorithm ) or ( modified orcadmplexity approximation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified orca evolutionary algorithm") or ("modified orcadmplexity approximation algorithms"))*.