Perhaps you should try some spelling variations:
"response estimation algorithms" » "response estimation algorithm", "response optimization algorithms", "response optimisation algorithm", "pose estimation algorithms", "response association algorithms"
"_ optimizer algorithms" » "_ optimized algorithms", "_ optimization algorithms", "_ optimize algorithms", "_ optimise algorithms"
"_ optimized algorithm" » "_ optimized algorithms"

Try widening your search to All Fields.

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