Perhaps you should try some spelling variations:
"_ estimation algorithms" » "_ estimation algorithm", "_ optimization algorithms", "_ optimisation algorithm"
"most optimizer algorithmss" » "most optimizer algorithms", "most optimized algorithms"
"most optimized algorithm" » "most optimized algorithms", "most optimizer algorithms"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("_ estimation algorithms") or ((("most optimizer algorithmss") or ("most optimized algorithm"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("_ estimation algorithms") OR ((("most optimizer algorithmss") OR ("most optimized algorithm")))).
• Removing quotes may allow a broader search: (( _ estimation algorithms ) or ((( most optimizer algorithmss ) or ( most optimized algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("_ estimation algorithms") or ((("most optimizer algorithmss") or ("most optimized algorithm"))))*.