Perhaps you should try some spelling variations:
"_ optimization algorithm" » "_ optimization algorithms", "_ optimisation algorithm", "_ optimized algorithm"
"_ estimation algorithms" » "_ optimization algorithms", "_ optimisation algorithm", "_ 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 ((("_ optimization algorithm") or ("_ estimation algorithms"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("post estimation algorithm") OR ((("_ optimization algorithm") OR ("_ estimation algorithms"))))*.
• Removing quotes may allow a broader search: (( post estimation algorithm ) or ((( _ optimization algorithm ) or ( _ estimation algorithms ))))*.