Perhaps you should try some spelling variations:
"pose optimisation algorithm" » "pose optimization algorithms", "pose estimation algorithm", "pose estimation algorithms", "qoe optimization algorithm", "_ optimisation algorithm"
"_ simulation algorithm" » "_ estimation algorithm", "_ estimation algorithms", "_ evolution algorithm"
"exact solution algorithm" » "exact evolution algorithm", "exact convolution algorithms", "exact evolutionary algorithm", "nacl solution algorithm"

Try widening your search to All Fields.

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