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.

• 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"))*.