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

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("done optimized algorithm") OR ("don optimized algorithm"))) or ("post estimation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("done optimized algorithm") OR ("don optimized algorithm"))) OR ("post estimation algorithms")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"done optimized algorithm\") OR (\"don optimized algorithm\"))) or (\"post estimation algorithms\"))".
• Removing quotes may allow a broader search: (((( done optimized algorithm ) OR ( don optimized algorithm ))) or ( post estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (((("done optimized algorithm") OR ("don optimized algorithm"))) or ("post estimation algorithms"))*.