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