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

You may be able to get more results by adjusting your search query.

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