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

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("_ optimisation algorithm") or ("qoe optimizer algorithms"))) or ("post estimation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("_ optimisation algorithm") OR ("qoe optimizer algorithms"))) OR ("post estimation algorithm")).
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