Perhaps you should try some spelling variations:
"modified choosing estimation algorithms" » "modified choosing estimation algorithm", "modified choosing optimization algorithms", "modified choosing optimisation algorithm", "modified caging estimation algorithms"
"modified notion optimizer algorithms" » "modified notion optimized algorithms", "modified notion optimized algorithm", "modified notion optimization algorithms"

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