Perhaps you should try some spelling variations:
"_ optimizer algorithmsss" » "_ optimizer algorithms", "_ optimized algorithms", "_ optimized algorithmsss", "_ optimize algorithmsss", "_ optimise algorithmsss"
"qoe optimized algorithm" » "qoe optimized algorithms", "qoe optimizer algorithms", "_ optimized algorithm"
"jose estimation algorithm" » "pose estimation algorithm", "risk estimation algorithm", "cover estimations algorithm"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("jose estimation algorithm") or ((("_ optimizer algorithmsss") or ("qoe optimized algorithm"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("jose estimation algorithm") OR ((("_ optimizer algorithmsss") OR ("qoe optimized algorithm")))).
• Removing quotes may allow a broader search: (( jose estimation algorithm ) or ((( _ optimizer algorithmsss ) or ( qoe optimized algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("jose estimation algorithm") or ((("_ optimizer algorithmsss") or ("qoe optimized algorithm"))))*.