Perhaps you should try some spelling variations:
"modified based solution algorithm" » "modified based evolution algorithm", "modified based convolution algorithms", "modified based evolutionary algorithm", "modified male solution algorithm", "modified based solutions algorithm", "modified water solution algorithm", "modified based evaluation algorithm"
"modified one approximation algorithms" » "modified time approximation algorithms", "modified _ approximation algorithms", "modified rough approximations algorithms", "modified male approximation algorithms", "modified near approximation algorithms", "modified orca approximation algorithms"

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