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