Perhaps you should try some spelling variations:
"modified deep evolutionary algorithm" » "modified deep evolution algorithm", "modified deep solution algorithm", "modified delphi evolutionary algorithm", "modified df evolutionary algorithm", "modified near evolutionary algorithm"
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified notion approximation algorithms\") OR (\"modified deep evolutionary algorithm\"))~".
• Removing quotes may allow a broader search: (( modified notion approximation algorithms ) OR ( modified deep evolutionary algorithm ))~.
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