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