Perhaps you should try some spelling variations:
"modified objective optimization algorithms" » "modified objective optimisation algorithm", "modified objective estimation algorithm", "modified objective optimized algorithms", "modified multiobjective optimization algorithms"
"modified made estimation algorithms" » "modified made estimation algorithm", "modified made optimisation algorithm", "modified made approximation algorithms", "modified pose estimation algorithms", "modified male estimation algorithms", "modified adam estimation algorithms", "modified df estimation algorithms"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified made estimation algorithms\") OR (\"modified objective optimization algorithms\"))~".
• Removing quotes may allow a broader search: (( modified made estimation algorithms ) OR ( modified objective optimization algorithms ))~.
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