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

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

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