Perhaps you should try some spelling variations:
"_ estimation algorithms" » "_ estimation algorithm", "_ optimization algorithms", "_ optimisation algorithm"
"most optimizer algorithms" » "most optimized algorithms", "most optimization algorithms"
"post optimized algorithm" » "post optimized algorithms", "cost optimized 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: (("_ estimation algorithms") OR ((("most optimizer algorithms") OR ("post optimized algorithm"))))~.
• Removing quotes may allow a broader search: (( _ estimation algorithms ) or ((( most optimizer algorithms ) or ( post optimized algorithm ))))~.
• Adding a wildcard symbol may retrieve word variants: (("_ estimation algorithms") or ((("most optimizer algorithms") or ("post optimized algorithm"))))*.