Perhaps you should try some spelling variations:
"_ estimation algorithms" » "_ estimation algorithm", "_ optimization algorithms", "_ optimisation algorithm"
"done optimizer algorithms" » "done optimized algorithms", "done optimized algorithm", "done optimization algorithms", "dong optimizer algorithms", "don optimizer algorithms"
"one optimizer algorithms" » "one optimized algorithms", "one optimized algorithm", "one optimization algorithms"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("done optimizer algorithms") OR ("one optimizer algorithms"))) or ("_ estimation algorithms"))~.
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• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"done optimizer algorithms\") OR (\"one optimizer algorithms\"))) or (\"_ estimation algorithms\"))".
• Removing quotes may allow a broader search: (((( done optimizer algorithms ) OR ( one optimizer algorithms ))) or ( _ estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (((("done optimizer algorithms") OR ("one optimizer algorithms"))) or ("_ estimation algorithms"))*.